A real quick one. One of my cronies - Simon Baynes - just pointed me to this cool regex visualising tool. Here's a screen shot of how it analyses a regex:
(the regex being a match for a CF UUID or GUID)
For those people who try to get up to speed with regexes but just never quite make it, this could be a big help possibly? If just for grabbing pre-existing regexes and work through the analysis / breakdown of them visually to see how it all comes together.
So there you go. Jeff Avallone is a bit of a star!