I have been working with the folks from Wilber Loves Apple on a Quick Look plugin for displaying UFRaw sidecar .ufraw files.
You can preview the development result the .ufraw id file represents. This way, you can quickly view which sidecars you want to use to create versions of your RAW files [1].
This is a beta release. Please use this forum to report any problems.
1Screenshots

2Installation
Download the following
, then mount it and copy the qlgenerator plugin it contains to your /Library/QuickLook folder [2].




