I don't expect you to size your site for netbooks specifically, but if you could provide an option that would be great.
For example, I run a 1600 by 1050 monitor on my development machine and I also own a netbook, many times I'm running both at the same time.
You do a really nice job of providing options for smaller screens now. A suggestion: An option to remove the View By row (but save the Add a Task), keep the folder tabs but remove the 2 rows underneath (but keep the print).
On a different note... While I'm sure you'll label this "beyond the scope of this application," the ability to do outlines in the note box would be very cool.