The Squeak community has been very busy inmany areas over the last few years. But one of the hardest, most complicated and time-consuming task was the release of a fully MIT-licenced release.This would be an important step towards a membership in the Free Software Foundation. Software Freedom Conservacy.
This seems to be achieved now.
[Update] But be warned: Squeak 4.0 is just 3.10.2 with all its bugs and problems, just relicenced under MIT and Apache Licences. If you want a stable release with real new functionality, you may want to wait for 4.1.