I'm not here to troll ModNation Racers but since the announcement of LBP 2, my excitement for MNR has dropped off considerably. I'm not a huge fanatic of cart racers but I enjoy them enough to play one occasionally. If LBP 2's racing is competent enough to scratch that itch, I don't have a need for MNR.  Certainly MNR will be a better cart racer but LBP 2 could offer much more like weapon, obstacle creation, and triggering events. This is all speculative of course but not out of the realm of possibly given what the LBP community has done.
 
Does anyone else feel like Sony made a mistake announcing LBP 2 a 2 weeks before ModNation's release? Why not wait till E3?

Nope. Modnation Racers is brilliant - I've had the game a while now and it's one of the best kart racers in a long, long time. The weapons are a bit weak - but the Create aspect is fantastic and the single player is surprisingly brilliant. The game's also had a slew of great reviews already in - yet still it's flying under the radar.
 
If you like fun though, you should give it a chance.

Maybe a bit, especially with the kick-ass trailer they released for it.

It's a bit like saying "Does the Gears Of War 3 trailer take away from Halo: Reach" though. It doesn't really, because they're very different games.

I think there is going to be a big enough gap between when MNR and LBP2 comes out that people will not feel tired of player created content games. And I agree with what people are saying that there is enough of a difference between the games on a fundamental level that gamers are going to be able to distinguish between the two.

I don't think so. Seems like they have a big enough gap there to not bite their own ass. I am very excited for Little Big Planet 2 though. Moreso than I was for Modnation. 

LBP2's announcement didn't effect my purchasing decision at all.
 
Tho posters and critics haven't said anything bad about the gameplay everyone seems to glaze over that area of discussion, leaving me with the impression that tho everything else is brilliant, the gameplay itself is on the mediocre. This has moved Modnation from a day-one purchase to a try-before-buy for me.
 
I still have hope in it, but with Red Dead here waiting isn't exactly killing me.

Two different genres.
 
Will Super Mario Galaxy 2 take away from Mario Kart Wii?

I'll probably agree with some of the posters here that, no... LBP2's unveiling doesn't hurt MNR at all. I think this game will tide people over until LBP2 releases.

" Nope. Modnation Racers is brilliant - I've had the game a while now and it's one of the best kart racers in a long, long time. The weapons are a bit weak - but the Create aspect is fantastic and the single player is surprisingly brilliant. The game's also had a slew of great reviews already in - yet still it's flying under the radar.  If you like fun though, you should give it a chance. "