HTML, CSS, DOM Scripting & AJAX as well as the application of various JavaScript libraries.
Classic ASP, SQL Server, PHP/MySQL with some ASP.NET of the C# flavour, oh and some Java too.
Adobe CS4 Web Premium - Dreamweaver, Photoshop, Fireworks, Contribute and some Flash. Aptana, Eclipse and Visual Studio.
Semantic Mark Up, Standard Compliant Websites, Extensive Website Usability and Accessibility, Business Analysis, Information Architecture (IA), and Search Engine Optimization (SEO).