I've figured out that the conditions can be written at the same time as the tree transformer, so if you get the urge to write one, go for it :)
I'll put up a list of Conditions to be written soon. I may even post Unit Tests for them.
FOAF updates: Trust rankings are now exported, making the data available to other users and websites. An external FOAF URI has been added, allowing users to link to an additional FOAF file.
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!