This Is Business, Not Personal.
techcrunch.com
techcrunch.com
IMO, Twitter should charge $0.001 per tweet and make $2M+ per month (http://royal.pingdom.com/2010/06/08/twitter-now-2-billion-tw...). They could also charge API users at $0.01 per sent tweet and $0.001 per received tweet and let the ad- or fee-based 3rd party twitter clients compete with a free Twitter(tm) client.