spam comments in pybloxsom

Hi,
I have been hit by a spammer during the lasts weeks who tries to flood my 
pybloxsom blog with spam comments, something really annoying. As I can see 
lots of us suffer from the same pain 
(http://www.bluesock.org/~willg/blog/dev/pyblosxom/commentspam2.html).

Lately I've been working to set up a new home page, and started using 
pybloxsom 1.0 from scratch. So I thought I had to implement some kind of
spam control or disable comments at all as I have done with my other blog (~ 50 
comments per day of spam).

Ok, so I just hacked a little bit the comments.py plugin to see what I
could get. Basically I try to mimic what gmail, yahoo and other do when you want
to open a new account, using distorted images. You could read about it in a
new entry in my blog, as it is a little bit long to be posted in here:
http://notreally.org/blog/devel/Python/pybloxsomnospam

As I say in that entry, I am not a very experienced python developer and
this is my first attempt to pybloxsom programming. I don't know if this is a
good approach and would like to receive comments/critics and/or improvements or
if this is a good way to avoid spam in pybloxsom comments :) It looks like it 
works for me (still work needed on generating the distorted images).

Thanks

PS: the web site is in a very alpha state, so it may fail!
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