Just had an interesting thought for the placement of the dpad and button cluster. 1) intead of having a big panel on the back of the device that you remove for dealing with the battery, have a smaller panel on the left&back of the device for sliding the battery in and out. 2) in the center of the back of the device, have a slightly recessed dpad (recessed so that it doesn't get triggered by having the device lay on the table) in reach of the left index finger. Perhaps have the "select" button be reached/used by the left middle finger. 3) within reach of the right index finger and right middle finger, put the button cluster (escape/menu/home and maybe fourth application specific button) 4) use side bars that are as narrow as the N810, but have them be stationary as I suggested in my last message. (so only the screen slides, like with a Sidekick Slide) 5) still need to decide where to put the camera So, that gets you the smaller profile of the N810, without sacrificing ergonomics. I'm not sure if this design (I'll call "dpad/buttons on the back") is going to be better or worse than my previous post ("dpad/buttons at the thumbs"), but I _am_ sure that it will get better usability ratings than the N810.