Pretty much they don't exist in the traditional sense that you'd see them in Yahoo etc. WNBA.com/ESPN will usually run a "fantasy" type game but much closer to a daily/weekly player pick'um - which WNBA fans play just to show we care enough to sign up and play the faux fantasy games so they'll put the time, resources and effort into building us something more similar to what other sports leagues have.
If you're interested, come into the Monarchs forum once the season starts, we'll have a group playing whatever WNBA.com/ESPN throws out this season.