It's been over nine months since Steve Ballmer whipped out the HP Slate at CES and divulged that there'd be Windows 7 "Slate PCs" hitting the market. It sure was a memorable keynote, but since that fateful day all we've got to show for actual Win 7 tablets are a slew of leaked videos of HP's elusive device as well as information / trade show sightings of lots of similar products. Until now that is. A small company, interestingly and rather ironically called Netbook Navigator, has managed to get its act to