Originally Posted by Jorge.
People at TouchArcade where incredible kind and had a lot of great suggestions.
You may also want to check this (I have never tried it): http://thebetafamily.com
People go there to find apps to test, and developers go to post their betas and find testers.
Those apps they list seem kind of boring, not that they don't deserve beta testing. I only like to beta test big name titles like wimp or something where I know that I will enjoy and love to give a lot of feedback.