ED
you can download the manual from the Garmin Website, as for the software, I would think you will have to go to garmin for a copy of the software, you may be able to get a used map source program, but make sure you get the "UNLOCK" code, it will not work without it.
I've had the 2610, was a great unit with the 2GB CF card it held all of the USA. I have the Garmin 2720 now and like it a little better, the 2720 will allow you to download custom POIs and has the 3D feature, although I don't use it much. I wish the 2720 had transparent data fields like the 2610, but other than that the 2720 is better....I also have a 2007 Wing with the built in Nav and it seems to be a good unit with a few missing features, like being able to download routes and waypoints....but a good unit none the less, it'll do all I need and then some...
I used the RAM mounting system on my bikes in the past and they work real nice...the RAM mount along with the RAM motorcycle mount with the hard wire allowed me to remove the GPS from the bike without much trouble...I like Jon's mounting system, but I never had one, so I have no comment on it..
As for the IWay, well do a search of the posted threads and make your own evaluation there....