Facebook App Mashups?

While reviewing a couple of the applications yesterday, I began to wonder how applications could start to tie together to help created bigger and better applications. RockYou for example, released an API for their Super Wall application. Currently Facebook doesn’t provide an easy way to leverage their existing wall system within platform applications. As a result, RockYou provided an API that can help you to expand your wall feature set with limited development time. I think there are a number of things that would be useful to the Facebook application developer community.