I feel there's definitely enough interest here to give this a try. What I will do is figure out a quick set of guidelines (like, not requesting tasks that aren't completely safe or something like that) and begin a thread for the Subbie Task in either the My BDSM life or Sexual Fantasy area in a couple of days.
Once I get it done, I'll post an announcement to the site to let people know it's ready so interested parties can have a look at it.
Sound good?