verify format of overheard twitter names

seen a couple of weird looking overheard tweets come by that make me think companies have pasted in the whole twitter URL for their account (rather than just the twitter name). Seems like the form field could either verify the format, or parse out the extra text.

i.e. http://twitter.com/getsatisfaction/st...
"@FreshFocus @http://twitter.com/hans_engel, an employee of TwitKit, just replied to your tweet on GetSatisfaction.com: http://gsfn.us/t/lz2"