I bought re-certified Nook Color from Overstock.com for $150. I plan to put CM7 on it, and configure it as an Android tablet. It has been suggested that I check for bad internal blocks. Seems like a good idea, but I don't know how to do that. BTW: I just bought a class 10 8gb a-data micro sdhc. I have read that some people have problems with the class 10. Any thoughts?