The N800 could theoretically be a great Webex client with the internet connectivity and media capabilities, but apparently the browser is not compatible. Has anyone figured out or built code to communicate with Webex?

At least with the service I use professionally, the Webex meeting manager client is a Java application. I don't know whether there's a J2ME implementation that would run on the N800, but my conjecture is that even if there was, it would probably be too lightweight for Webex.

I tried installing Jalimo and then running the webex client, but still no go. Anyone have any better luck, or find a java solution for maemo that supports more stuff?

You might want to look into the vnc client (either in normal mode, or in listen mode). UltraVNC provides a 'single click' configuration, that makes it perfect for a support based environment. In my department, I have a 'Uvnc single click' exe on the website. All the customer does is downloads the small exe, and runs it, and it connects to my vnc client (tablet or otherwise).

http://www.uvnc.com/addons/singleclick.html

edit: looks like I was mistaken. I can't seem to find the command line switch to put the vncviewer into listen mode. (vncviewer - listen doesn't appear to work)

The vncviewer commonly available for the tablets is somewhat stripped down. I think there's a straight-up compile somewhere, which works (probably including -listen), but doesn't have helpful keymappings (full-screen toggle, OSK, etc.). If you can't find that, or it's not suitable, you can always build it yourself...