now that the kingston 2gb mmcm cards are so cheap, I have one loaded with os2006 and one with the latest 2007he. I just shutdown, swap cards, and boot back up into the OS I want. 2006 has a couple of advantages still, but I actually use the he more often these days. I prefer the bluetooth options and the improved wifi setup. On the other hand, it's more work to set up my BT DUN and the latest Maemo Mapper.