If you've been living in the Twitterverse then you've surely felt the aftershock of Bill Gates making his first official appearance on the social media ripsnorter just hours ago. As you'd expect, @BillGates is following a number of accounts related to the Bill & Melinda Gates foundation. He's even following a few tech-media dignitaries like Kara Swisher of All Things Digital and Steven Levy of Wired. But of the 40 accounts that Bill is following, we didn't expect to see Ashley Tisdale (fresh off her Microsoft Store performance) and uh, Ashton Kutcher on his rather exclusive list. Hey Bill ol' buddy, why not try @Engadget if you're looking for internet friends?