Right now, it's only on the iOS platform, so anyone with an iPhone or an iPod touch can leave a tip on any topic they can think of. There's no way to verify the source of the tip as of yet (unless the person explicitly states it in the tip). The identity of the author, however, is tied to their Facebook (and later on, Twitter) account.

If it takes off, we have plans to expand to the iPad and the Mac platforms, and then possibly a web and an Android version.

Cool. For some reason I thought you all had found a way to ingest good tips from Facebook/Twitter without having the user opt it into your platform. Sort of like a replyz.com (not at all perfect -- but good try) but for tips.

Oh!

Well, the app has a unique way of organising and displaying tips. There's so much more to it. Check out http://scapehouse.com to see what I mean. ;)