I was just curious, since I don't seen twitter links showing in Google webmaster tools (yet I guess), does the PR of your twitter account matter yet?
I was surprised when my bball site's twitter account showed as a PR-5? on Google toolbar, SEO book tool, and on the first tool in google for PR, Google PageRank Checker - Check Google page rank of any web pages, at a 5...just under 1800 followers for this twitter account, so I figured PR-2 at best.
About 2% of the site traffic comes from Twitter, so I guess the main question is does your Twitter PR matter yet? or is it simply number of relevant followers?
College Hoops (collegehoopsvid) on Twitter is the twitter site if really bored.