My question would be what this really does that isn't already happening. App discovery is definitely an open problem, but if what you're doing is facilitating sharing apps with people who know you (already easy directly between individuals) or seeing what people at large like (already done via the top charts), I'm not sure what the point is.

Also, and I know from sites like Flickr that I'm not exactly making a bulletproof point, I really dislike the whole "leave off a letter" approach to naming a product. Telling someone "jungle dot com, but without the e" moves you from a two syllable TLD to one that requires an extra five and perhaps a follow up just to make sure they're searching for the right thing.