There is obviously great potential for a service like this.

With so many forms of communicating and networking available, it can sometimes be hard to remember just which service was used in some instance. If you can search across all services to find what youre looking for, its going to save time. There is likely significant demand for a tool like this.There is also room for evolution. What other kinds of features could Greplin offer in the future, taking advantage of all the services you give it access to?The site is in beta, and once you give it access to your info, it says it will email you when the systems ready for you. TechCrunch has a demo.