I recently had to do some serious HTML parsing for a client. Regular expressions were the way to go. So I downloaded RegexDesigner.NET from Chris Sells site: http://www.sellsbrothers.com/tools/#regexd This tool is great, simple to use and even generates code for you! In fact that site is packed full of really useful tools.
Thanks Chris - you saved me a whole lot of time! P.S. Maybe you can get the RegexDesigner into Visual Studio?