I bought a Verbatim Premium 8 GB Class 6 SDHC Flash Memory Card recently and I'm ok with it. Verbatim not so popular brand for SDHC cards but this one is great. Ok it's not something you want to buy if you want a high speed card for movies but this is a class6 SDHC card which gives you enough power and speed for your normal photography needs.
It says Verbatim Premium 8 GB Class 6 SDHC Flash Memory Card has minimum Write and Read speeds of (66X) 9MB and (120X) 20MB/sec respectively. This might be variy depends on your Camera, Card reader, Computer OS, and USB port. I have seen lots of happy comments about this from Customers at Amazon, so I guess this is a better SDHC card than average.