Very nice UI. One big improvement could be a small graphic with instruction when you get to the blank dashboard. At the moment it's looking a bit empty at first impression (and that matters!)
Maybe provide a desktop version which is just a shell for the online site? That is, using AIR or Prism or other?
Webpage tabs get closed, open, closed.. if this is actually updating all by itself throughout the day, I could see value as running it like a desktop app.
The cost is minimal (to make a prism version for example) and it takes 0 maintenance, and some users which are not uber-geek enough to make their own desktop version might see it as a big plus. "And it run on desktop too? Cool".
Also I could see it running a "public version" on a television hooked on the wall for everyone to see the web app live. Just a thought.
You seem to have all your features coming along, I just wanted to bring my 5c :)
I wouldn't bother with a desktop version, most users already have enough things running. Doing a Dashboard widget would be easy through, so would a notifier plugin for the common browsers
Maybe provide a desktop version which is just a shell for the online site? That is, using AIR or Prism or other?
Good luck, it looks like a great product.