bill-gatesBill Gates jumped aboard the Twitter bandwagon a few hours ago, sending out an update on his upcoming annual foundation letter. (That’s on behalf of the Bill & Melinda Gates Foundation.) His photo is pretty conventional though. He lacks the bad-ass bulletproof vest of Google CEO Eric Schmidt.

And who does Gates enjoy conversing with the most? Radio host Ryan Seacrest, of course.

The pair have been tweeting back and forth about raising funds for earthquake relief in Haiti. He follows a veritable Who’s Who of interesting non-profits plus celebrities like Ashton Kutcher and Ashley Tisdale. In a very short time, he has amassed more than 100,000 Twitter followers.