Just recieved a 4gb ATP ProMax Class 6 SDHC card. Works fine with the sdhc kernel patch. Don't have a reader that'll work with it yet, so no definitive benchmarks - but the card feels quite speedy compared to my cheap OCZ SD card. Paid $82.11 CND (72.36 USD). Which is darn cheap compared to what local stores in Toronto are charging for the exact same card: $127.99 CND (112.81 USD)