Marc,

Thanks for the answer. I was hoping that a factoring out the interface would be
easy enough then I (and others??) could look into writing a Selenium
implementation. Such refactoring could be useful even without plugins. WebTest
has already moved once from HttpUnit to HTMLUnit. Of course, I understand that
it's easy for me to say how easy interface factoring would be for somebody else
to do ;). I'd use Selenium RC for Java.

On the conversion side, I have looked for such a converter without success. If
anybody knows of one, I'm interested. Writing my own is certainly a possibility.

As Paul said, a larger man power would be needed for this purpose. If you're interested, you're welcome (this is serious!).

You shouldn't underestimate the work for that. When you talk from Selenium for instance, you probably mean Selenium IDE or Selenium HTA, otherwise it is too limited. Even with that, many WebTest featureswould be missing, so you would end up implementing something for Firefox and something for IE. If you want to reuse your WebTests in Selenium, what about and XSLT to transform your WebTests to Selenium tests?

Marc.