Plucker
With AvantGo changing their policies and placing limits on subscriptions to free channels, I happened across Plucker this past week. It gives you the same capability as AvantGo, but runs entirely on your PC (no middle man to go through to synch with web content).
It's compatible with any existing AvantGo channel, although I don't think it supports posting data like AvantGo does. And it's not as user-friendly as the AvantGo service, but hey-- it's free, remember (not to mention open-source)?