Randomly...
One person will sitemail me a random listing of the 24 owners. A different person will send me a list of integers 1 thru 24, in a random order. I post both lists. I match up the two lists and that determines the draft order.
For example, first list might look like this...
ballantine
schwarze
buddhagamer
wildthings1
...
Second list..
23
7
3
18
...
So ballantine picks 23rd, I pick 7th, etc.