From a Search Engine Land Blog post by Greg Sterling:
This morning there are two new entrants in the “real-time” search derby, run by two search veterans. They are CrowdEye and Collecta. CrowdEye is from Ken Moss, who ran search engineering at Microsoft and built the new engine himself. At the helm of Collecta is Gerry Campbell, who was a search executive at AOL and Reuters, as well as an adviser to Summize (now Twitter Search). He recently stepped into the CEO role at the company.
The blog post goes on to offer an in-depth overview of both services.
Source: Search Engine Land