I missed the post about why one should use twitter…
I like twitter for a couple of reasons. One is that it keeps things short. But more so, as a rural community college instructor, I really don't have a lot of people to talk pedagogy with. However, with twitter, I can see what other people are doing in their online classes, discuss the latest plugins, follow innovative things like the Digital Humanities stuff that's happening right now, find out about conferences and grants.
And oh, via twitter, I managed to snag a 4 day pass for SDCC, Wild Wild West Con, and PHXCon. All for the super early buyer price.