I used to try and consolodate, but at this point it's a pain in the butt. I know I have about 7k on my alliance AH mule {I don't even PLAY alliance, but with a crappy server balance, some stuff is just worth buying and xfaction transferring}. My boxers all have about 2k per slave, my mains have somewhere between 3-5k on each. My abandoned alts all probably have about 200-500g each and my horde AH lacky has about 50k right now.

I should probably move it all to one place, but I never remember too. It's easier just to have the money if I need it and not worry about it otherwise. It gets kind of annoying to have to keep swapping to another toon to fish crap out of the bank for alts {I am guilded so I don't have full access to the guild bank on all my toons, only on one, as a safety precaution}. I've got enough to micromanage with tradeskills, reagents, etc, I'll pass on micromanaging my cash too ;)