It actually updates when you click "add venue" an restart the app. (Don't ask why: it's a secondary effect). I've been meaning to have it update when you click on the profile picture, but haven't gotten around to it. (auto-updating can be a bad idea for those of us without 3G).

Friends is next on my to-do list, they'll be accesible through the leaderboard. Hopefully, sometime this week.

Last checkin next to photo sounds like a cool idea, I'll add that to my todo list.

Choosing where to post is also on my to-do list. Even I find it annoying not being able to change this.

Sorting venues wil probably be a bit of work, so I'll try and get around to this after I've gotten everything else polished. Since you can search anyway, I don't see it as being really important.

Thanks for the feedback, cheers!