Hi FRDO,
Mitel did release the softare for about 2 days, I downloaded it and installed it at our office to test - the main problem I had was the upgrade process caused problems, i.e. all files are not loaded back onto the Mitel when the system does a restore.
I have spoken to Mitel tech support, they are aware of the problem caused with the upgrade, this is one of the reasons why they removed the software from MOL - they have also advised that they have some problems with the SIP side of things and they want to resolve before releasing.
Regards
Andy