Because DCE/RPC is *horrible* ? :-) :-). If you need a new RPC protocol please use ONC/RPC/NDR not DCE :-).
I agree, I think I've grown a few gray hairs from DCE. I guess the argument in favour of it depends on how similar the kinds of lookups WINE needs to make are to existing, implemented, RPCs. If there isn't much overlap then yes, choosing DCE RPC doesn't buy you much in terms of reduced amounts of code on the server.
-- Luke
-- Luke Howard | PADL Software Pty Ltd | www.padl.com