oDesk is a homeshoring marketplace in which anyone can randomly take free certification exams, then become an oDesk "provider" working on tasks in a variety of fields.
I did some brief browsing to see about this homeshoring category, since I suspect it may be "a winners take all" niche where 1 or a few leaders dominate & end up getting more of the volume. It appears that eLance leads in volume, & oDesk is growing fast. Other sites like guru exist, but seem to have less volume than these aformentioned 2 sites. oDesk seems to provide more statistics than eLance about average hourly rates by skill & country, etc.
If anyone has experience with any of these homeshoring sites, pls hit up the comments with your $0.02.