I have a 2 Gig card that I bought for my old cell phone. I was going to sell it until the info was released that the Wii will use SD cards so it has been sitting on my desk waiting for a Wii to be put in to.
I'm going to shell out for an 8Gb SD Card. Only half the capacity of an XBox hard-drive, but twice as reliable, and twice as fast. Plus i can whack in all my photos and MP3s and have them cranking thru my surround sound. Win all round I think... (cept for the prices of 8Gb SD cards atm..)
I have 3 sd card 2 512's and one 1gig....gonna use a 512 that gives me a gig total with the internal...should be enough but madden always uses too much memory....its all good though Im not gonna buy madden until I beat zelda and red steel.
It has 512 megs, but this is also needed to store Virtual Console games. I think realistically 2-4Gig should be ample. 200 songs plus quite a few photos, and PLENTY of space for saved games. SONY's 60Gig hard-drive seems overkill.