After way too long, I've taken some time to re-implement the RSS feeds from CAREO. The new implementation is infinitely more scalable than previously (now uses periodically updated static files, rather than regenerated-every-time live queries).
The downside of this new implementation is that you can't create your own feeds from any query. I'll add any new feeds that people want, but I preferred the personalized and on-demand nature of the previous implementation.
Unfortunately, that on-demand regeneration from live queries was the achilles heal, since it caused the server to fall flat on its face once adoption really took off. A victim of its own success, really...
For now, the feeds are regenerated daily (at, or shortly after, 6:00am MST).
RSS feeds are now listed in one central place, at http://careo.ucalgary.ca/rss/