HtmlUnit interpreter is a translator for testgen4web recordings. It is a wrapper around htmlunit library which does an excellent job in emulating the browser.
The tool isn't new, it has been around for a while. TestMaker from pushtotest ships with both testgen4web and htmlunit-interpreter.
More documentation at:
http://developer.spikesource.com/wiki/index.php?title=Projects:TestGen4WebDocs#Installation_and_running_translators
Download latest copy from:
http://developer.spikesource.com/frs/?group_id=14
I recorded a video demonstration for using htmlunit-interpreter. A less well known tool compared to its firefox
You can find other video tutorials here:
http://developer.spikesource.com/wiki/index.php?title=Projects:TestGen4WebDocs#Tutorials