Regular SDs and the newer SDHCs (SD with 4 and 8 gig memory - different addressing scheme so normal SD readers can't see 'em). all of the SD memory cards I have for the palm pilots will work just fine, though I did get an 8gig card 'cause it came 1) with a card reader (i'd have needed one anyways), and 2) was still $30 off!

I love 1) moore's law, and 2) grand opening sales...and 3) making numbered lists, apparently.