I have a Kingston microSDHC card from newegg I'm using in my 8320 right now and it works fine. I currently have it loaded with about 3.5GB of stuff and I can access all the stuff on it just fine.

I gotta admit though, it was a real PITA getting that card in the slot. The first time I did it wrong and it wouldn't read the card. The second time, I got it right and it's been working fine since.