Ask HN: I want to launch a real time q&a service

I'm thinking of launching a question & answer service where you can ask questions, and then it will search the network to answer the questions.

The network will consist of people who registered with a profile with things they might want to answer.

In the beginning I would start specifically with people who would like programming questions answered. Maybe the rails community to start off. An example of a quick question would be maybe how a line of code works.

This would be similar to the now defunct aardvark.com, but would allow people to connect to each other to create answer networks.

Thoughts, feedback, or ideas?