I have not used AvantGo in a while and it looks like quite a few changes have happened since then. The new AvantGo version 6.0 build 3006 adds support for Windows Mobile 5.0. Unfortunately, it still does not offer support for VGA screens but a new beta version is expected to address this in early 2006.
If you already use AvantGo, you know that it now supports RSS feeds (and has for a while). I have added an AvantGo RSS button to make it easier to subscribe – Look for it on the right side in the section ‘News syndication’.