File
"/home/rclark/lib/src/python/pyparsing/pyparsing-1.3.1/pyparsing.py",
line 971, in __init__
    self.maxLen = sys.maxint

AttributeError: 'module' object has no attribute 'maxint'

sys.maxint was changed to sys.maxsize, but this was not noted in the
documentation.

Maybe it was not noted, but it is documented: 
http://docs.python.org/dev/3.0/library/sys.html

sys.maxint was *not* changed to sys.maxsize - it was simply removed.
pyparsing apparently hasn't been ported to Python 3; please bring this
up with the pyparsing authors (but then, Python 3 hasn't been released,
so they might decide not to take any action for several years, until,
say, Python 3.2).

sys.maxint used to indicate the maximum value that an int could have. In
Python 3, the int type has no maximum value anymore.

The only place where this might need some notice is the whatsnew text.

I've added a comment next to long -> int in r60280.

Please note that Python 2.x doesn't run under 3.0. You have to port the
code to 2.6 first, make arrangements and at last use the 2to3 tool.