Improvements to LinkedIn

I am an avid user of LinkedIn and love this product. It is clean and professional. Have following proposals for improvements

1. Answers: Provide a way for community to rank answers and automatically filter by rank vs. date modified.
   
2. Answers: Recommended Answers on home page can be personalized by intelligent analysis of the profile
3. Introduce a new property called "Reading" - idea here is to have the community contribute freely available and quality good reads on multiple professional topics. The categories should closely mirror the jobs or answers etc. And then have a Recommended Readings from the homepage
   
4. Other: There are rumors they are planning to go public. Here are some ways to elicit new product ideas.