Timeline for Python?

[Sebastian Bassi]

Hello all,

I am working on a Python book, since it could be completed in about a
year (writing time + edition + publishing) or more, I would like to
know what version to target since I don't want to release a book that
will be outdated just after is printed.
I use 2.4 for everyday work but most webservers still carry 2.2 (and
most programs runs w/o any modification, since I don't tend to use new
features), but publishers know that people like to buy lasted version
books.
So, if the book is published in October 2007, should feature Python 3
or Python 2.5?
I did read http://www.python.org/dev/peps/pep-3000/ but I still not
sure about timeline.

Best regards,
SB.

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