Have you found all 500 of em? I found my 500th three days ago after one year of playing regularly to find the last one..

I'm still looking for my final one and is it ever frustrating.

"I'm still looking for my final one and is it ever frustrating.
"

Too bloody many

I managed to get to about 450, and i realised that I was never going to be able to do it without the use of a guide (which in my book is heresy ^_^)

Yeah I'm in the position of I have 499 Agility Orbs and I'm one short on the hidden ones too.  it's such a pain in the butt.  

300 if I remember correctly.

"300 if I remember correctly.
"

nah, haven't found them all.. i'd like to though, but i don't have the patience to go all over the map..

Nope

I did, and I'm proud of not having used a guide. Haven't found all the Hidden Orbs, though.

Nope, I gave up after 2 hours of searching.

I actually make myself sit down and try to look for those damn orbs, but I usually get bored after I find my tenth one, then I just move on to another game

I got all 500.

i managed 123

I got all 500, it took me a while.

Man, reading this thread made me think about how I never played Crackdown. I want it now...

I'm at 496 right now and I'm so close! The hidden orbs are a whole other story though.

Missing a couple mystery orbs, and have since then deleted my game save. Might go back and finish just for completion sake (starting a new game unfortunately). Would also have to download the "new" content to get those two racing achievements.

I restarted Crackdown from the beginning about 6 days ago, and I've been at 498 agility orbs since day 4. I didn't use a guide to find the ones I've come across so far (I don't think that using a guide is bad though as some people seem to think), so I don't really want to resort to one at this point just to find the last 2. However, it's getting kind of tedious now. I've even resurrected and re-killed all the gangs twice now to have something to do while looking for them. I'm also at 250+ hidden orbs, though for whatever reason I'm not as intent on finding those...

Found my 499th on Wednesday, and just found the last one about 2 minutes ago. Now for those last 12 Hidden Orbs.

I'm missing some of the secret (hidden) ones... I got all the agility orbs, thankfully.

I found my last one while playing co-op.  My partner went to get one on a crane, but he fell off and landed on a sea mine.  The explosion made me look over and the same orb he was going for was the last one I needed.  Now for the hidden orbs...