Mark Fowler is doing a Perl Advent Calendar again this year.Each day he picks out a useful or interesting module that you likely haven't heard about. Very fun and useful.
If you are impatient and want to open the rest of the doors, then you can go back and play with the calendars from 2000, 2001 or 2002.
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!