There's been a flurry of interest on reference managers, and especially Mendeley, so I thought I'd throw up a few links that you will find useful.
- Reference managers were discussed at ScienceOnline 2010.
- A blog post about that session:Gearing up for scio10: Online Reference Managers
- A handy Wikipedia page
Here's another link to Martin Fenner's clear and focused reference manager comparison chart.