The nice people at Balsamiq have given me a copy of their Mockups tool to review (thanks Valerie).
I’m going to give it a good going over for a few days and then I’ll do a nice long write up. In the mean time here is short video to show you what it’s all about…

I love Balsamiq mockups! Use it almost weekly!
However, software UI tools don’t seem to solve the ‘first ideas’ or ‘napkin drawings’. For some reason, I can’t bring in software until the idea is a little more clear, since all UI software (incl. Balsamiq) only allow pre-set controls.
To solve the early stages, I use:
http://www.MockupMagnets.com
Very fun magnetic UI widgets for prototyping on a whiteboard. You should try them!