With the exception of a break to have an excellent dinner with James Marcus, I've spent the last twelve hours working on the Python Challenge. It's like playing Myst but with Python scripts and the Web.
I'm currently stuck on level 17 and just asked my first question on the forum.
I'm happy to give anyone hints up to that level.
UPDATE (2005-05-09): Up to level 20. No hints on the forum yet :-)