Although I'm loving Lion overall, I'm disappointed that I can't use AirDrop. I frequently exchange files between a Mac Mini (2008), iMac (2008) and Mac Pro (2010). While I have been getting by on a combination of email and DropBox, I was eagerly anticipating using AirDrop to eliminate the internet usage. Unfortunately, none of these machines are compatible with AirDrop! *sigh* Why are the requirements so high? The machines aren't that old.