ADVRider is going insane right now. Nearly every build thread, tutorial, and diagnostics walkthrough is in pieces. It's beyond frustrating. I'm wondering how long before someone starts a class action lawsuit on this. I'll bet it is winnable.
Smugmug is another great hosting site. It's privately owned by a motorcycle fanatic. No real great reason to use it over any of the other options. But if I had to choose to give my money to a corporation or to a private motorcycle guy I won't have to think twice.