.Net Regular Expression Site

I ran across this pretty cool .Net Regular Expression site at www.dotnetcoders.com today, thanks to www.dotnetwire.com, and I figured I would pass it on.  I have been thinking about putting up a .Net Regular Expression Tester/Resource, something I could easily access for reference whenever I'm writing regular expressions.  I'll see, I may still put something together, if for no other reason than to learn more about regular expressions.