Also I would be on the high end of your $70-200/hr range, and I've heard a lot of stories of Toptal members being pressured to charge low rates. If you can give me work that pays better than my own current rate, without a big time investment up front, then I'd be very interested.
I must say Toptal sure has great PR! They have really positioned themselves as the place to go if you want to hire elite people. But I'm skeptical given the effort to apply and the rumors about lower-than-promised rates, so maybe you can beat them in terms of client satisfaction and customer retention.
I noticed your site has a weird double scroll thing (Firefox on Ubuntu), and the freelancer signup form has triple scroll bars. Seems like a detail worth fixing.
In the video you seemed to really resist their advice to start out handling things manually (like invoices). I guess that was two months ago, but you might want to listen to them a little more. :-)
Anyway I'm pretty booked for the summer but I still might sign up just to get on your list and see if you can boost my rate. Good luck! :-)