So, I just started using lightroom (yes I know I am way behind the curve), and I am in LOVE!!! I have been looking for presets ever since I started. I especially like that you can use lightroom on non-raw files as if they were Raw files. Like I said, I am in love. I have decided to compile all of the useful info (free and paid) that I find onto my blog and hopefully it will help you too!!!
OnOne – http://www.ononesoftware.com/free/ (Free versions of some of their popular plug-ins)
Auto FX – http://www.autofx.com/freeplugins/dreamyphoto.asp?id=4
Adobe Photoshop Exchange – http://www.adobe.com/cfusion/exchange/index.cfm?s=5&from=1&o=desc&cat=190&l=-1&event=productHome&exc=16
Action FX – http://www.actionfx.com/pstools-photography.html