I'm not exactly a virtual assistant per se, but I search and apply for writing and copywrite/editing jobs and am working on a site to offer a full range of writing services. I've also just become a healthcare recruiter. For this you have to spend alot of time on the phone (which I don't always like but can handle much better than daily face to face or the politics of being in an office) to place drs, pharmacists, high end healthcare workers with hospitals, clinics, etc.