This is my first post to this group. I've found that using a wireless KB/trackball has been a great help. For PC I use an Adesso WKB 3000UB (http://www.adesso.com/products_detail.asp?productid=336). It's like a 2 handed mouse so you can quickly toggle between orbit (scroll wheel in and trackball) and pan (scroll wheel in and L mouse and trackball) when moving around the model. I see they have many more models now. Some may be better (like programmable function keys) but I find this KB to be ergonomic heaven. Anyone else using it or other input tools like this?