I have five warcaft accounts, each on its own battle net.
The registered owner information is the same, but they are on different B.Net's.

I've had my banker give 20-25k, to a toon on the same account (via game mail).
And then had that toon distribute 4-5k to each of the others.
Then have all five purchase their epic flyers.

I've also directly mailed 20k to five brand new level 2 characters.
Which was actually a screw up, since I had to wait an hour on four of them.
Again, they were all on my warcraft accounts/battle.net accounts.
They're my Cataclysm speculation team, 100k in mats (less the cost of bank tabs).
But will be a lot easier to track exactly how much each makes that way.