Links this week – May 24th 2010

Want to find mass influencers? Find: Rich, iPhone waving, young people

Games and Apps on Facebook will now be able to send email invites to play the game (and join Facebook)

Online campaigns influenced UK voters, it seems.

Ten guidelines for running an online competition.

Passing the 100+ (genuine) followers on Twitter threshold is good for business.

Is marketing on Twitter a waste of time? Seems not.

Old but fantastic all the same. Watch the real-time purchasing map from Zappos.