FWIW, I just bought a Patriot Media Class 10 16gb SDHC and I’m using it with an adapter which looks kind of no-name. It came with the camera, which I bought slightly used.
The card was, as noted, a bit flaky at first on the initial format (took 2 attempts to get it recognized) but so far it works fine. I’ve tested recording, playback and transfer. No problems at all. Not trying over/undercrank yet. The card cost $39.99 at Fry’s.