Conference Recommendation
1. Harvest "Research Raven" into structured form (this may require getting permission):
http://www.researchraven.com/about-us.aspx
Microsoft Academic Research has this data but it seems limited to computer science. PubsHub also mantains such data but it's proprietary.
2. Using keywords from a user's profile, match people to upcoming calls for papers at conferences. Sort into two categories: conferences to attend and conferences to submit to.