I installed it - seems to be all right. Big improvements:
O2 Active UI v3.6.024 -well, seems to be more stable than previous versions
Bluetooth build 3900
Radio build 1.12
Windows mobile CE version 1.40
BlackBerry Connect v2.0
Removal of Photo Contacts
AND AND AND.... are you ready?
WINDOWS MEDIA PLAYER 10! I am not joking. I've got it on my BA.
Strange O2 does not list WMP10 in the features of the new ROM.
Download it from http://www.my-xda.com/
You'll need your O2 number and IMEI to accessd the software upgarde section of the site.