Updated list of open-source projects.
Merge pull request #44 from dblock/oss

@dblock => Updated list of open-source projects.
Draft: Building an English Auction with MongoDB.
Merge pull request #43 from dblock/building-an-english-auction-with-mongodb

@joeyAghion => Building an English Auction with MongoDB.
Fixed post date.
New blog post: notifications and personalized mails
Incorporating some of Joeys comments
Some edits
split up long json