Every single module involved is part of the standard distro.

Well, paint me green and call me a python hacker - amidst all this reinventing talk I completely forgot that. It even appears to be standard in 5.0004 (or whatever that silly version number I keep confusing is). This should tilt the equation in its favour, but I'll probably write it the other way too, just for fun ;-).

Thanks for the advice.