I suppose that everybody allready knows, but Google Calendar is out. Check out the overview for more info - it is the best on-line calendar I've used, but there are some performance issues IMHO. Try it out for yourselves.
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
Keep up with the latest Advogato features by reading the Advogato status blog.
If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!