Four short links: 25 June 2009

How an Indie Musician Can Make $19,000 in 10 Hours Using Twitter -- as Zoe Keating pointed out: "cash made by @amandapalmer in one month on Twitter = $19,000; cash made by @amandapalmer from 30,000 record sales = $0". The Nike Experiment: How the Shoe Giant Unleashed the Power of Personal Metrics (Wired) -- And not only can we... http://ping.fm/wPsja