To start off with thread is not me being the indecisive bimbo trying to decide which one I want. I'm going PS3 and I still want to play MW2. This is me asking what are some of the differences when it comes to online, online gameplay, community, and matchmaking time. 
 
Don't bother going over graphics since I could really care less at this point since they're so similar.

Don't expect too many, if any differences, it's the same game dude with the same audience.

Get it where yuo have friends (if you have friends)

Controller will be the only difference.  And if you are going for the PS3 for a FPS, you are making a mistake.

All the same. I own both versions. The PS3 to play Spec-Ops with my brother and the 360 to play with my friends. From what I see its the same thing. Unless you get the PC version. Then theres a difference. You get ripped off by $10 because all other PC games are $50 (except the soon to be Assassin's Creed II) and you have mouse & keyboard. Depends on what you prefer.

less kids with headsets on PS3 i suppose?

i think the ps3 version have less glitch or maybe the psn community use then less don't know.

" less kids with headsets on PS3 i suppose? "

There are a few subtitle things that you will notice between the two.   
 
The first would be headsets.  There are far fewer people with headsets on the PS3 because they have to provide there own then the 360.  Overall, I say that its a positive, because it relates to far fewer mics getting muted, but in my 4hrs of playing on the PS3 I have gotten far more "Your a hacker cunt", which I'm not, messages than my 3 days worth of playing on my Xbox.  I'll take reading those messages over hearing them any day though
 
The second is that I have experienced far less significant lag and glitches that severely dampen the experience on the PS3 than Xbox, but small lag is a bit more noticeable.   
 
The third is that Xbox has a superior controller layout compared to the PS3.  Even though D-Pad is of better quality on the PS3 it is sometimes a pain to get to in a firefight. 
 
The fourth is that Xbox generally gets all of the DLC earlier than PS3, but I myself consider this to be a very small benefit.   It really only benefits those kids who want to start console wars.
 
The fifth is that online gaming is free on a PS3 compared to Xbox Live where you either pay around $7 a month or pay around $60 for 13 months.    
  
The sixth is that downloadable content is a lot easier to manage on the PS3 then Xbox due to the pricing.  The PS3 actually uses real dollar amounts while Microsoft uses it's stupid point system. 
 
The seventh is that the menus load much faster on the PS3 then Xbox.  Xbox's dashboard takes a while to load your friend list when it starts. 
 
The ninth and biggest factor is who you would actually be playing with.  If you want to play with you friends, which greatly increases the experience, then buy the system that they have.  If none of your friends really play video games then I suggest doing some research on the exclusive titles that each system has and go with the one that interests you most. 

The PS3 version is not as hacked. 
 
That's about it.

no difference.  
not as much glitchers who hacked and things like that though.  
and not as many whiney annoying little kids.  
 
add me DeMolay88, and ill play with you. 

My friend has trouble when he plays on 360 but apparently is much better on the PS3...I don't know if that reflects play style of the community or what.

i have both. there is no difference 

" The PS3 version is not as hacked.  That's about it. "

Controller and less microphones is going to be the biggest difference.

Thanks for the input guys.

well, there are less mics on the ps3 version. i think less glitches on the ps3 version. layout for controllers are different. really no big difference in them. good to know that u are getting it for the ps3 i guess.

i think the ps3 has a better community.  they understand the game better.  when i played 360 version i noticed a lot of people trying to steal care packages, running around aimlessly, etc.

The only real differences are 

1. The controller
   
2. From what I understand people talk a little less on PS3, Which is both good and bad.

Yeah probably less talking on PS3, but that should be the only noticeable diff.

Apparently a different controller is the biggest difference you'll notice between the 360 and PS3 versions of MW2 and perhaps the potential for less players using a mic as well on the PS3.
 
And to the guy calling people 'cows' and so forth. Don't turn this into a system wars / flame bait topic. Leave your fanboyism at the door thanks!

i thought it took a second to get started up when you picked online mp, but then i saw the 360 was identical.
 
as said before, it seems like there's fewer glitches, like that private match playlist thing wasn't on ps3.
 
but yeah, get it for whatever your friends have it for if you have both.

Less people with headsets.

" Less people with headsets. "

Same game.
 
Difference is you get XBL services on it (like every game on the 360) and you get PSN services on the Playstation 3. There also seem to be less people with mics (which is a good or bad thing depending on your situation). Just go for the version that has more of your friends playing.

I actually just switched from PS3 to PC myself. Talk about a big difference. I played the first one on the 360, so it feels like I've gone from kids to adults.

The PS3 controller is about 1000x better.

The 360 has more users on it, also they will get the map packs first.

1. what controller do you like better.
2. where are your friends.

On 360 people talk more, you get to decide if that is a pro or a con.
 
Also, I'd imagine that their are more boosters on 360, just because it is more popular.