I am thinking of creating a site that allows users to 'speed network' with other like-minded professionals via quick video calls. I would find it helpful to know if this is a problem that people are looking to solve- being able to make valuable connections quickly online- and if the idea for this site sounds like something that you would be interested in using.
I agree with Jason that most people avoid networkign for the sake of networking... but there will always be that segment that believes any connection is a good connection.
I see your most active market being salespeople, recruiters, job seekers, and entrepreneurs.
The only thing with video calls is that they do take time to prepare for off camera, no matter how short the actual screen-time is, especially if they want to make a professional first impression.
I don't know if I'd be interested, but I do think people in the markets I mentioned would love it.