What will i do with the N900? See if it function in the same way as a PC with the same efficiency and whether it is much easier and convenient to use than a PC. Test out everything...see if the browser is fast or not on
3G and wifi compare to a PC browser. See how good the camera recorder is....and how effective is the GPS system. See if there is an app that simulate the album scroll of the iPhone and see if there is apps for AIM and Yahoo Messenger; how effective is push emails. See how useful the radio transmitter is. See if the screen is responsive or not and if i need a screen protector. Just basically test everything out.