Any way to sort a list of forums by activity?

[CarCdr]

You can do this with mod's if you do not mind that they will always look that way. It's also a fair amount of mandraulic work.

Define the letters as categories. Then, for each real forum, set the display order so that there is, say, 25 between each one. That way, you leave room between any two forums to insert new ones in the right order. Example:

A Perfect Circle = 25
AFI = 50
Aerosmith = 75

and so on.