Thought that I posted this already...maybe I just didn't really push the "go" button.
Anyway...I use fltplan.com (note flt...not flight) for most all of my flight planning. I use it for wether....flight plans..and etc for all over the U.S. There is a strong support for jet/corpprate flights. It is FREE TOO.
So, I also use it on the BB. There is a smaller BB viewable site at.
http://fltplan.com/pda.htm there you can file, get routes, weather, aiport info....and more.