class 6 cards are the fastest microSDHC cards. I am picking up a bunch of 1gb microSD cards today to install and test on then when they are running, sell them to people that don't want to bother with installing anything other than a memory card.
i'll also work on getting contacts to import.
if anyone wants to donate microSDHC cards for me to test on to try and figure out which work/which don't and why, send me a message on
http://www.myhtcphone.com