I could swear I remember reading somewhere that it was similiar to BF2 or Generals...
Edit- I went back to try to find this quote and its in the xfire Dev chat-
Delphi-PG: Will the server list be based like the steam server list? or will it be like the BF2?
The list will be very similar to BF2/Generals.
This doesn't say whether it will be using a Gamespy backbone or not, and I agree I hope not (btw I'm "Perp" from the DoW strategy guide Nightly Lessons Learned- good game!)