Im working on a remake of the classic mp map from DF2 for Half Life 2. Ive kept the layout pretty much the same but there are some major changes due to some of the restrictions of the physics engine in Source. Such as the water tunnel leading up to the conc rifle. Connecting water brushes cant be at two different levels (water seeks its own level) so for that part I just put in an elevator shaft that came out pretty cool. Just check out some of the screens if your interested.
Http://www.geocities.com/inzanetortillasnark
Http://www.geocities.com/inzanetortillasnark