The other day I posted a blog entry about the migration of RegexLib to ASP.NET V2 - the article can be found here:
http://markitup.com/Blog/archive/2005/06/07/50.aspx
In the coming week I'm planning to post a source code viewer so that you can see how that site has been put together and I'm also planning to release a couple of articles (not sure where yet) - the first of which will be an article describing how I migrated the existing users into the new Membership feature.