(Last post tonight, I swear!)
The FedEx day today was pretty cool. Jens and I worked on polishing up Mike's calendar macro, and I'm proud to say it's available now. Unfortunately, we spent a good chunk of the day trying to get the AJAX responses formatted correctly across a whole bunch of actions (ick), so we didn't get as much as we would have liked done. It's a bit rough around the edges, and has limited functionality, but it's getting there. If I have time in the future, it's definitely something I'd like to pursue. The AJAX used in it is also quite hacky. I looked into wrapping DWR around it, but it wouldn't work with the plugin system we're using (no way to dynamically load the DWR beans from the plugins, as far as I can tell), which would have made implementing it SO much easier.
We had a presentation on a number of the other tasks for the day, and I must say there were some REALLY cool ideas that came out of it… if any of them end up being released, it'd be great. 
UPDATE: Jonathan Nolen has posted about his FedEx Day, all the way over in San Francisco. I have no idea what he was working on, but it seems like he had fun!
I think you need the DWR ScriptedCreator.
http://getahead.ltd.uk/dwr/server/dwrxml/creators/scripted
I’m keen to make “DWR beans” not be special in any way - it’s just code you have lying around so if you can’t get your code working using ScriptedCreator then join the mailing list (http://getahead.ltd.uk/dwr/support) and we’ll make sure you can.
Hi Joe!
Thanks for leaving a comment! I had a look at the page you linked to, but I’m not sure how that would help. In the Confluence application, we have plugins that are loaded at launch, and users are able to drop/upload plugins as well.
What we’d like to do is define DWR beans within Confluence plugins, which would then be loaded, in addition to those beans defined in the main dwr.xml file (dynamically). From what I’ve read and gathered from those at work, we can’t do that (currently) with DWR. :-/ It would certainly be neat, though.