Looks like I'm never going to be able to get away from people wanting an admin driven global categories tool, so here goes :)
Basically I'd do pretty much anything for a plugin which allowed each blogger to select from a drop down or AJAXy menu the predetermined category(s) that their post fits into.
If it replaced / added to the existing WP categories too then that'd be great too.
For example with education it might be:
kinder
high school
maths
geography
etc.
The user simply ticks the category or categories that the post fits into.
And that on the top level of the site a page is created for each category (i.e. edublogs.org/global/kinder or edublogs.org/global/maths) where all the latest posts allocated with that particular, preset, category drop into there... blogstylee.
I'd pay for a solution - or help fund one that someone wants to release OS here - I'm so desperate!
james /at/ incsub (dot) org