I used Expresso first time today and I liked it much more than the Regulator that I've used up to now . The 'Regex Analyzer'-View and the 'Search Result'-View display the Regex and the matches as a tree and this helps me a lot in understanding Regex's.
I've always wanted to mention that I'm using a visual studion plugin named Cool Commands. I'm using just one command of it: 'Collapse All Projects' . It collapses my 20 projects in a solution with one click! Will the brand-new visual studio 2008 support that out of the box?