Website copywriting with the benefit of experience.
One of the first web sites I wrote was for the Windows 95 Online Launch Event. The Web (and Windows, for that matter) has come a long way since then. It's no longer enough to simply adapt print pieces for the web. Increasingly, web copywriting needs to take a non-linear approach--and keep search engine optimization in mind.
Please note that some of these sites have changed since they were originally written.