imup4 is a new social networking tool that mimics the way people make plans in real life - on the go and last minute when they feel like doing something.  Say you feel like getting drinks tonight or lunch tomorrow. How can you make sense of your 1,000 Facebook friends while trying to plan drinks in the next three hours? Just tell imup4 what you’re up for and it tells you which of your Facebook & Gmail-sourced friends are up for the same thing at the same time!

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