I discovered Indeed the other day. They hail themself as "One Search, All Jobs". It's quite true. You can do a single job search and pull aggregated results from just about every job site you can imagine.
As with all new sites I discover, I looked to see if they had an API. They did. An hour or two of tinkering later, I had a job site created which lets you search jobs from all over the country posted on any number of sites.
My job site isn't something I am trying to monetize (much) on. It was just a fun project to throw together.
