You know "there's an app for that". But how do you find it? Chomp is a new search engine just for apps. Instead of searching by app names you can search by app categories. If you're looking for games you can be really specific like "puzzle games" or "kids' games". Results are then displayed along with review ratings and one click takes you straight to the iTunes store. They've also got a great page full of "trending iPhone app topics". If you're looking for app stats, Chomp also produces "Chomp Charts" of usage trends, seasonal queries, app monetization and the "Chomp 55" which are the most downloaded and highest rated apps. "Chomp Charts" are in a nice slide show presentation that are free to download.
Of course, Chomp has its own app so you can search right from your phone.