Why on Earth did you need to change the APN to send MMS? In my experience it just ... you know... sends them. If you do get stuck for some reason just go to unlockit.co.nz
Yeah the keyboard is a little narrow, guess I'm just used to it. In my experience I cannot type on Android without wanting to throw it across a room. Tap, tap hard
, wait, registers a key-press, tap, tap hard
, wait, registers a key-press. F that, at least Swype is available though! Makes typing on the Nexus 7 a little more bearable.