I've been looking around for a moto-friendly GPS but can't seem to find the sweet spot. They're either too big (iWay 500), don't have a battery (Garmin 26xx, 27xx), don't have a touch screen (Garmin's marine models), or aren't waterproof (most everything else).
I'm holding out for the TomTom Rider, which should show up in the U.S. someday, but if it's anything like the other TomTom's it will have a weak screen that's hard to read in sunlight.
I'd normally gravitate toward Garmin as a brand, but have heard very bad things about the point-of-interest database in their latest CityNav 7 software. Apparently there are way fewer POIs (like 1/2 as many or less) than in previous versions.
Oh well.
Here are some good sites I've found on the topic:
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http://www.gl1800riders.com has a very active GPS forum. It's a great place to get motorcycle-specific GPS info.
http://www.gpspassion.com is an awesome site for GPS info in general. These guys are indeed passionate over all things GPS .[/list]