Yeah, that's definitely good, but I was thinking a lot smaller.
I hadn't thought it through, but it would be really cool if the "married" product had a switch so you could program either the Arduino or the XBee via the same USB port, too.
Safe to assume you've integrated lipo charging via solar in your design? I've wondered about the requirements on the solar and lipo to power JUST an XBee running 24/7 as a router would be. Obviously need to factor in worst case for sunlight, which is the most annoying variable. That's a long way further down my project design, though.
To start I need to create the smallest XBee/Arduino "fob" that I can. I don't need it powered all the time, but I do need it to be able to wake up within a couple seconds from a single button press.
--Donnie