Elsevier has bought Mendeley! Just when Menedely had ironed out most bugs and was getting really useful. This is possibly sad news. See their blog entry here and the public reaction in the comments!
There is more info in this blog post
I’m going to be investigating moving to Zotero as my main reference manager. It’s open source and unlikely to ever be purchased by a large multi-national. I’ve also heard good things about it.