I'm guessing we probably just didn't see this forum post.
I can't address your question directly, as I'm not involved in the development side of things. The data generator started out as a side project by one of our developers, so it hasn't seen much work lately as most of our resources have been focused on version 8 of SSI Web. I had thought I had seen him testing a new build of it that could launch multiple browsers to take the survey, but I'm not sure where he's at with it and he's on vacation for the next few days.
We understand the value of having a way to test your surveys, so I would not view this as an abandoned project. From my understanding our end goal is to integrate the tool into SSI Web itself, though I don't know where that falls in the list of priorities.
One tool you might look into if you want very robust testing is a Firefox add-in called Selenium. It allows you to create scripts to interact with websites automatically, either by recording your own input or modifying the scripts by hand. I believe a few of our developers use it currently for testing SSI Web.