Python and Puzzles

Amongst my recent searching for something pythonic that I don't remember, I stumbled across this:
The Python Challenge
which is based off of this:
The Riddle - notpr0n
(which I must investigate at a later time)
Also, in my googleings, I found this
Python Puzzles
which looks interesting as well.

I started the python challenge, and got through the first couple, spending only a couple minutes on each (less for the first one). You basically use the riddle given by the page, and put the answer in the url for the next puzzle. (You can also see the long explaination of the solution to the last puzzle) I have to admit that my solutions were a bit simpler than theirs (such as using 'chr( ord('k') + 2)' as opposed to some mapping scheme using a string.trans() that I didn't see the documentation for in the python quick guide), but everyone's different. If you know python, or any programming language, check it out. (The faq says that only 2 of the challenges are python specific)