Plinkton,
Perhaps you are confusing memory with storage.
The memory or RAM is behind a panel held with 2 screws on the base of the machine and can be upgraded from 512 Mb to 1G whereas storage can be added by putting an SD card in the slot on the right hand side.
After playing with the machine for a few days now, I wouldn't bother upgrading the RAM since the machine is quite speedy anyway. Would be a different story if you decided to run Windows XP I guess....
So far I have no real complaints. Yes the keyboard is smallish, but then that's the whole point of the concept of the unit. Skype works very well and to my surprise people report that the inbuilt microphone gives high quality voice output.
Octane