And Stephen - go to Lynn's post here: http://www.clicknewz.com/1385/twitter/ and watch the CommonCraft video - excellent explanation!
But mainly, the thing is, you won't really 'know' what it can do for you or how you can benefit from it until you just jump in and DO IT! Many (or most) of us were skeptical prior to actually jumping into it and getting involved. I can tell you that it has been WONDERFUL for me - in many ways!
You just have to dive in!
