I'd just like to speak up in support of Susan Davis as well, and in support of all sex workers in their struggles against both systemic constraints and against wrong-headed ideological assaults.
Here is an interview I did with her a while back:
http://www.xtra.ca/public/National/Giving_sex_workers_control-4423.aspx
(note: there are some not-totally work-friendly, albeit harmless, ads on the same page as the story)
awesome article!!thanks for creating awareness about barriers facing us!!!