Doing some research I came across this website:
Moto Guide
I'd highly recommend this site for people just starting out with GPS (like myself). It has a lot of information and easily explains things for newbies to understand.
**EDIT
Alex, what do you think about
this auction? I'd hate to keep bugging you about this, but I had a specific question about the Segway mount. It looks like this bundle comes with a RAM Segway mount and I was wondering if you knew whether or not I'd be able to connect this to the handlebars on the Ninja. I thought this particular auction was pretty good b/c it looks to be brand new and it comes with City Navigator. Whatcha think?