Hi all,
I've written a simple windows gadget (desktop widget) to monitor the BTC/USD exchange rate at Mt. Gox. It looks like this:

It displays the current exchange rate statistics, and will glow (in a non-intrusive way!) when the rate goes up or down, or when the volume increases.
Anyways, I'm selling it for 0.10BTC. You can purchase it at
http://www.bitcoinservice.co.uk/files/859. For those concerned about security, note that a .gadget file is simply a zip archive, and everything is in clear (the bulk of the gadget is specialized javascript); so you can audit it before you install it.
Any remarks or suggestions welcome!
PS: for those who prefer linux, just a reminder that I've made a similar widget that you can get for free:
http://kde-look.org/content/show.php/Bitcoin+Rate?content=138572PPS: is there a place on the wiki for software like this?