Oftentimes I when I go to different social events subject of twitter comes up fairly often. Since I am bad with remembering (and lets face it, some people have crazy twitter handles) their names, I like to follow them right on the spot.

What I do right now is open up my sms to 40404 and type 'follow' and hand them the phone so they type in their name. It would be awesome (not to mention money saving) to not waste SMS messages on that and have the functionality right in the app.