I found both these over the weekend and they both look really interesting:
Cubic - from the same folks that make Selenium
CubicTest is a graphical Eclipse plug-in for writing Selenium and Watir tests. It makes web tests faster and easier to write, and provides abstractions to make tests more robust and reusable.
CoScripter - IBM(?)
CoScripter is a system for recording, automating, and sharing processes performed in a web browser such as printing photos online, requesting a vacation hold for postal mail, or checking flight arrival times. Instructions for processes are recorded and stored in easy-to-read text here on the CoScripter web site, so anyone can make use of them.