The "Nearby Stream" is kind of a mystery to me.
The sorting appears roughly
chronological (newest on top), but the locations?
I have a bunch of total strangers there, from up to 100 km away — and people I know living less than 30 km away don't show up there.
It would be nice if we could minimize posts & comments similar to folders in the Mac OS X Finder list view.
This would ease up navigation.
Oh, and the mobile web interface could do with a bit of tweaking, too. You should include the fantastic iCab mobile browser <http://itunes.apple.com/de/app/icab-mobile-web-browser/id308111628?mt=8
> for the iPhone in your tests, it's just awesome!