I love my N810 because of it's openness not only with software but the host mode USB. When I found that Bluetooth keyboard software support was poor on the N810 I was able to use a small USB keyboard to draft blog posts and chapters of a book. The USB also allowed me to easily transfer files to and from USB memory sticks which are universally read by any PC. Lastly the USB allowed me to access pictures from the SD card in my camera. The N900 is more phone and less computer. I bought the N810 in part because it wasn't a cell phone burdened with carrier controls and limits on access. One has to wonder is the lack of USB was a marketing ploy to differentiate netbooks from the N900. I can't see a technical reason for eliminating USB since that connector is becoming the standard charging systems on phones.