dxw00d:
Alternatively, use a terminal emulator that supports cursor movement, then you could position output as you wanted. I believe PuTTY supports VT100 control codes, and probably others.
Bingo! This was my original question. When I use my LCD I can position the cursor. But as I said sometimes I don't want to setup a complicated hardware setup just to try out a new sensor or a new way of programming something. I've been thru several terminal emulators. None had cursor position ability. I'll give PuTTY a try next. Thanks for the suggestion.
After playing with firmata and MS Silverlight for a while I believe I could develop some really nice interfaces with the Arduino. Unfortunately I suspect for me to come up to speed on this would take a number of weeks. A rough looking terminal emulator should do fine. 