I shoot 16GB cards unless I happen to run off without them, then I use my older 8GB spares. As soon as the Sandisk 32GB cards are available and budget permits, I'll be getting four of them. I think the Lexar 32GB cards are out now, so if I had to buy today, that would be my choice. For now though, I'll wait for Sandisk.

The lack of hassle with worrying about changing cards is well worth the price of admission, which seems to be falling quickly anyway. I have two slots and set the camera to record to both cards at once so I have an instant backup. Otherwise, the all the eggs in one basket thing might scare me a bit.