the m528 is a nice device but the battery only lasts 2-3 hours and it costs about $500-700 depending on which brand you buy. I wouldn't get it unless you plan on spending that much and you want to mod it for more battery life. This guy modded his with an extra battery for 4-6 hours of life. X86 sucks at idle power though so your battery will be dead in a day compared to 10 days of the n810. Just wait for the next nokia tablet IMO it should be nice.

http://www.youtube.com/watch?v=S8YNkZ4pfYA