Snipped from #wowace 2007-05-26, late in the night:

wobin_	Not sure if it works with 2.1
wobin_	and there's no documentation whatsoever yet

wobin_	but if you look at Splutton.lua in Splut, you'll see how to register

wobin_	Basically you: local Cow = WheresMyCow:RegisterAddon("Splut")
wobin_	at the top

wobin_	then for every frame you want to watch: Cow.RegisterFrame(Cow, Splutt.Header)
wobin_	then use /wmc <addon name>

wobin_	Then press shift and mouseover to see the frame
wobin_	and shift-mouseover-tab to cycle
wobin_	and shift-enter to move down to the children of the frame

wobin_	I think =P
wobin_	It's been a while since I wrote it
