In October 2009, I wrote a blog post about migrating a Joomla! 1.5 site to version 1.6. I gave it the ambitious title of Migration from Joomla 1.5 to 1.6 will be easy. And it probably will. When the script is ready.
However, Joomla 1.6 was released this week without a migration script in place. When I started to look at the state of this script, it seemed everything stopped back in 2009. Apparently, there was little interest from developers to create this script.
After some digging, I contacted Matias Aguirre, the one who started the original discussion around a Joomla 1.6 migrator script. He responded immediately, and I got some more info on the script. Matias has been working on a script called jUpgrade. It's partially working, but he needs help finishing it.