If you are a freak 3D object modeler and CADing is your thing make sure to check out AutoCAD360 and eDrawings Pro cause they both work solid (no pun intended) even on Q series.
AutoCAD360: If you don't have an account make sure you register on your Z or online cause on Q register screen is a mess and you wont be able to submit registration but once you log in everything flows and slides and there are no issues. Marvelous interface and possibilities.
eDrawings Pro: My tool of choice, works superfast with shadows, antialiasing as long as you have 500mb of ram free (even on Q5). More complex models lag a bit when you rotate them and sometimes interface would freeze if you go into cross-section but once it loads its a smooth ride.
I am looking to see if I can find a download of Edrawings for my playbook. I am out of the office a lot and my customers like to send info via Edrawings. No Z phones, just the PlayBook!
This is really good to know. I use solidworks for CAD design and being able to look at parts i have in my BOX account would be sickk. Thank you for the heads up.