Stumbled across Regular-Expressions.info, which claims to be "The Premier Web Site about Regular Expressions" and I certainly found one or two handy hints to help me fix a few bugs with my blog.

And while I am on the topic someone posted this site on the CFCDev list today: Regular Expression Library, which has some 638 expressions from contributors, is fully searchable and it even has a little test application for checking your RegExp against JavaScript and ASP.