My first real project with Drupal 6. I just felt like a somewhat improved version of Drupal 5. Nothing really shocking, nothing large, just minor. Theming is fairly different though. And not a lot of the modules have been ported yet. So probably will be using Drupal 5 for a while.
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!