Supposedly someone with a 6700 has a 4 gig mini SD card to work. He didn't partition it and he supposedly has loaded more than 2 gigs of stuff on the card so it isn't a fake, 2 gig made to look like a 4 gig.

http://www.howardforums.com/showthread.php?t=1039425&page=2&pp=15&highlight=sda+gig