I've tried out a few toy programs in the past and I found that they didn't convert very well and commission was relatively low.
Also, logic tells me that most of my surfers are men (based on the type of sites I run), and most men are pretty happy using their hand for self-pleasure.
If I had a site that targeted women I would DEFINITELY be promoting toys though, seems like it would be pretty easy and lucrative to sell sex toys to women who are aroused and penis-less.
-Phil