I've received a number of emails over the last few weeks, and you'll be happy to hear that my ULT Sandbox page is now posted at http://drupal.org/sandbox/jthorson/1073590. I expect to have Initial module code posted by the end of this week.
In the meantime, I've set up a a demonstration site at http://ultdemo.thorsonsolutions.com ... feel free to play around and see what you can break. (The site will reset itself every 2 hours, so feel free to experiment!)
There is a small number of known bugs posted in the Issue Queue on the sandbox site, even though the counter reads "0 open, 0 total" ... there seems to be a site-wide 'issue counter' bug on Drupal.org right now. In the meantime, clicking on the '0 open' or '0 total' links will take you to the issue queue, where the current known items (and 'Add New Issue' links!) can be found.
Looking forward to your feedback & opinions!
Thanks in advance,
- jthorson