Thanks for the replies, the instructions GeneralAntilles linked appear to be for setting up partitions also they appear to use ext2 instead. Is partitioning necessary for formatting to ext3? I really want to keep the whole thing to a single partition as it is if that's possible... also the instructions seem overly multifaceted for something this trivial, isn't there something like "format /dev/mmcblk1 -fs ext3"? Also if I use ext2/3 will I still be able to connect the N810 using the USB cable with WinXP?