It's stuff like this that I can get into: a tag search utility that's actually simple to use. Check it:

1. Type your keyword
2. Click icon for list links

Now, keotag doesn't guarantee any accuracy, or really give you any options, but it is a quick way for people to search a lot of social bookmarking sites all at the same time. Has the ubiquitous "beta" tag, so you know it's got that Web 2.0, AJAX-y goodness at Keotag.