Hello there. Sorry for not taking the time to post this earlier.
The python-psp.net site has been down for a while, due to some financial difficulties preventing me from paying the bills at WebFaction. I plan on migrating the whole thing, Trac+SVN, on my home computer to avoid this in the future. Less bandwidth, but more availability.
Meanwhile, you can still download the latest binary release here:
http://fraca7.free.fr/EBOOT.PBP
As well as the standard library, which should be unzipped at the root of the MS:
http://fraca7.free.fr/psp.zip
And the latest source here:
http://fraca7.free.fr/python.tgz
With my apologies.
fraca7