1. Yes. It will be on CPAN, and I would suggest individual contributors do the same.
2. No.
3. The idea is to convert a human readable page back to computer understandable. What you do after that is up to you. Once the framework and parsers are developed then perhaps an aggregation system can by built around it. But that's much later.
4. No.

I am already writing this. What I am looking for is maybe similar projects, design suggestions, etc. before I put something up on CPAN. It never hurts to bounce ideas off smart people.