There are some phase 3 trials going on in canada right now for vaginal DHEA ( I think they're calling it vaginorm, but also called prasterone). DHEA is a precursor for both testosterone and estrogen, and there's mounting evidence that vaginally it will only cause local effects including increased lubrication, sensitivity, improved ability to orgasm and improved drive.
I'm waiting to see when this will come out.
tara