I got almost 6MB/s write speed with the stock SDHC card (4GB capacity) that came with the N1. I replaced the stock card with a 8GB class 6 card I had flying around. To my surprise, the class 6 card isn't faster! Write speed is still slightly below 6MB/s. The point is that I eventually want to upgrade to a 16GB. But if the class makes no noticeable difference on the N1, I might as well get a "slower" class 2 card. Thoughts?