samba - Jul 2005 - Participating in AD dfs on a Mac Os X (10.3.9) X serve

We have a choice of either using a win2k3 server or a 10.3.9 Xserve ( 
which we use for samba fileserver) for dfs.
Want to try the mac, but since apple doesn't seem to have a utility for 
this I'll have to deal directy with samba3, which
I don't mind.
 
Just wanted to hear some success/horror stories from mac people about 
dfs, or some gotchas.

Ours will be about 20GB.

Thanks,
Tadashi Inayama