EdSets - Helmet Headsets designed by a motorcyclist for motorcyclists. Great customer service, outstanding products, tremendous value. I have three of these headsets and thoroughly enjoy their sound quality.
Gold Wing Motorcycle Accessories - This site is run by V & P in MA. The site doesn't necessarily look real pretty or high tech but there is a good selection of lots of GL1800 accessories, great prices, and the customer service is top notch. These folks are genuinely appreciative of the business you do with them.
Electrical Connection - "Making motorcycle electrics less painful than a root canal since 1994." That has to be the best site intro I've ever seen!
Bushtec - I'm breaking away from the norm here. I've never owned a trailer or a hitch for a motorcycle and I never will. However, I've seen the owner of this outfit at a couple of rallys and witnessed his work online in different forums and can honestly say that if I were to someday change my mind, the only trailer and hitch I would consider would have to come from these guys.
Wingstuff - They have just about everything made for the Wing
Direct Line - A lot of stuff and guaranteed low prices here. You can even buy a Gold Wing from these folks! The only rap on these folks is they don't let you know when things go on back order unless you call them to ask the status.