7 ways Twitter improves an IT conference. And 2 ways it makes things worse.

This week, VMware announced that the presentations from VMworld 2009 were available for download. And they, of course, used Twitter to do so -- a much used source of "data center dialog," if I do say so myself.It's been a few weeks since VMworld, but I'm amazed by the engagement still going on with that show via Twitter (check it out for yourself at #vmworld). As Andi Mann from EMA pointed out