Using Twitter For Social Change, Or To Find A Kidney

They probably never dreamed of listing: track election results, drive the Arab Spring or find a kidney.
John Timpane of the Philadelphia Inquirer told Here & Now's Robin Young that one Minneapolis musician was able to find a kidney on Twitter.
"He said I need a kidney, and this became a hashtag, and somebody had a kidney and contacted him via Twitter and I'm told he got the kidney," he said.
There's also the assistant principal in Upper Marlboro, Maryland who uses Twitter to bond with students, and to stop some of the fights that start on the micro blogging site.
And we heard from listeners who are using Twitter.
@isitvegan writes:

"I use Twitter to discuss what products are or are not vegan. Crowd sourcing ingredient lists and veg restaurants."

Meanwhile, @gregkuloweic, a ninth grade teacher in Plymouth, Massachusetts says he Tweets to share and promote his students work.
And we can't resist posting this rap, "Hit Me On Twitter," by Mistah F.A.B.
http://www.youtube.com/watch?feature=player_embedded&v=WgkpJeBrqSo
How are you using Twitter? Tell us in the comments section or send us a Tweet and follow us on Twitter @hereandnow.