Downloads
Many free downloads are available for camera enthusiasts.
Adobe Camera Raw Presets
If you use the latest version of Adobe Camera Raw that comes with Photoshop CS5, you can download a free set of presets from this source:
http://www.ononesoftware.com/products/perfect-presets-camera-raw/
Adobe Lightroom Presets
Use this link to download free presets for Lightroom:
http://www.ononesoftware.com/products/perfect-presets-lightroom/