I recently found Mendeley Research Networks and I am very pleased I did. What a great concept. At its core, Mendeley is a desktop bibliographic database that allows you to manage all of your references in one place and then synchronise it with an online database. This allows you to have access to your bibliography from any online access point, whether you have your computer with you or not. It can sync with Zotero and Cite-you-like, as well as import from EndNote and Refworks.
As if this nice functionality wasn't enough, you can;