I just got Arduino Uno3 too, was using that to control a variable DC power supply. it's pretty easy to do basic stuff, am still trying to get more advanced coding done.Got my tft yesterday too.. !!! Horray.. I love Arduino stuff.. Its just so fun.
I did the 1.8" tft shield w/joystick/sd card for now because it had all I needed in one shield.
Its for the front end/display to my automated test system for testing products at work.. I will use one mega for the "master" system that runs all the start/stop/interlock buttons and then multiple megas (slaves) to do all the switching,etc...