I'll bet the entry price
could be $100 or less for ultralights, and certainly less than $1000
for a top end model with color display.

Maybe someone with a bit more electrical knowledge than I have could
marry a cell phone (they all now have GPS chips in them), a PDA,
something like pumped up Blue Tooth or 802.11g, and some Shareware
software to get this done? Some of the new PDAs might be able to get
the job done with nothing more than the software? See:

http://web.palm.com/products/smartph...50/index.jhtml

If it's not actually attached to the plane the FAA can't have too much
to say about it........and if you can piece the system together from
"off the shelf" hardware the lawyers will probably have a hard time as
well.

Of course an Open Source soultion like this may be hard to impliment
here in the US since there isn't much profit involved :-(
================
Leon McAtee
I know someone is going to say cell phones are not legal in planes here
in the US..............but that's another subject.