CrossLoop, a company that allows two people to share their computer desktops, has launched an online marketplace where you can find experts to help you with a wide range of (mostly computer-related) topics.We’ve already written about how CrossLoop is really useful for giving tutorials, since a teacher can not only look over a student’s shoulder, but also interact with their computer desktop. There are a lot of web conferencing tools out there (even free ones, like Dimdim), but CrossLoop focuses on teaching, not business meetings. You can see that focus in some of its features — it doesn’t bother with the usual conferencing features like a whiteboard — and you can also see it in the Monterey, Calif. startup’s recent moves. At first, CrossLoop just provided the sharing technology. But at the end of last year, it started allowing “helpers” to create profiles, so you could find out more about someone before giving them access to your computer. There are now more than 5,000 helpers on CrossLoop who have held more than 1.5 million help sessions, says co-founder Mrinal Desai. The help marketplace, where you can search for and compare different tutors, is a logical next step. It also answers the question we’ve been asking: How is the company going to make money? Desai envisions the marketplace as a kind of eBay for tutorials and tech support — with CrossLoop taking its cut of the money made, of course. Not only can users search for a helper and look at their profile (see screenshot below), they can also rate their tutor after the session, and other users can make decisions based on a tutor’s reputation.