http://blog.us.playstation.com/2011/07/07/psn-summer-sale-2011-30-off-11-games/ 
 
I can't seem to decide on what games I want. Stuck between About a Blob and Scott Pilgrim. Any recommendations out there? 

PixelJunk Shooter 2 is probably the best value in the sale, a great dual joystick shooter with an interesting multiplayer component.

Risk: Factions is good, but I've had shit luck online-- the host either drops out or loses connection in the middle of games, which means I've never finished an online game yet. The core of it is great, though. Scott Pilgrim is alright, probably worth the discounted price. Pac-Man CE DX is fun, but I got tired of it quickly.

I bought Tales from Space: About a Blob. It's just ok, nothing special.  
 
The more important point here is, BUY PIXELJUNK SHOOTER 2, if you haven't already. 

I should probably get BttF. Is the sale over tomorrow?

Swarm for 7 bucks? God damnit, I have to buy that.

Risk Factions is really fun. I bought that, Shank, Back to the Future and Pixeljunk Shooter 2.