Not SharePoint authoring per se, but here’s a good article on MSDN about using FrontPage 2003 to write ASP.net pages. The article is written by Dave Berry author of FrontPage Unleashed books and one of the FP MVPs who I recently met when they came to Seattle a few weeks ago.
That reminds me; I've been meaning to point to this article about creating data-driven sites with FP2003. It's a great overview of new data features, and a good place to start if you are not sure where to begin with data views.
[edited 5/6/04] Note the above article has been around for a while (since October I think), and is called, “Building XML Data-driven sites with FrontPage 2003“. If you've been following data features in FP2003 since launch, you may have already seens this.