[domodomo]

If you can't export and save it should be fine. Also I doubt you can create a clickable PDF with this, which is one neat use of Balsamiq.

ux.stackexchange.com is exactly their target demo. Normally a company like Balsamiq would pay for ads on a site like this, that would entice you to try their free demo. This cuts out that step, they can try a basic version of the software right on page. And it's good for the ux.se community too.

Pretty brilliant move.