Drafts, the fantastically convenient note taker from Agile Tortoise, has been updated to version 2.5 for iPhone and 1.5 for iPad. New features include Dropbox actions, URL actions, Share Actions, Action Directory, URL Callbacks, and Action Triggers. In other words, even higher level ninjary than Drafts already allowed.
Based on a recent patent filing, it looks as if Apple may be looking at even more ways to buy and share apps. This approach would be a bit more social as it would allow your friends to share applications with you that they think you may enjoy. This could work through the network, through a cloud service, or through IR.