I've got a 2008 white MacBook 2.4GHz C2D (7,1) with 4GB at 667 - running
4 desktops with Mail, Chrome, Safari, Address Book and iCal running. No
problems at all . . .
Likewise... My early 2007 2.16 C2D MBP w/ maxed-out 3GB RAM is loving Lion so far, other than the ubiquitous Flash issues that causes whole system lockups. I'll just be avoiding Flash for awhile I guess. I'm amazed how fast Lion is on my old'ish machine. Faster even than 10.6.8 (though doing a clean install likely helped that cause a bit, hahaha).