An article i worked on has recently been published on MSDN. The article, Designing and Developing High-Performance SharePoint Server 2007 Publishing Sites, explains some tips and tricks on getting the most out of your WCM sites built on SharePoint Server 2007.
Here's the article summary on MSDN:
Learn about the Web Content Management features in Microsoft Office SharePoint Server 2007 that enable organizations to deploy Internet-facing publishing sites, and considerations for developers and designers when designing and building high-performance publishing sites.
It covers benchmarking, resolving common coding performance issues, site structure and taxonomy, improving the page load time, caching and compression.