you mean like every wifi ap ever?
WDS doesn't work at all with a lot of APs, and doesn't work properly with even more (e.g. won't interoperate with other AP software than itself.) Tomato and OpenWRT are both good platforms for actually making WDS work, though.
Same comment as the one I made above. WDS and ESSID are different things.
ESSID is the one that's worked from day one. WDS (4 address frames) took a bit longer to be properly comprehended by P802.11 and it is not something you want to use unless you need it. I remember an 802.1/11 summit in a plenary meeting where competing views of how to comprehend WDS in the 802.1 architecture were put forth.