If you didn't already know, R6D23 is finally out.

You'll need to have CDA version 162007/1 or 162007/2 to receive this through the Sony Ericsson Update Service (SEUS).

Phone info after upgrade:
Phone Version: CXC162037 R9G007
Bluetooth Version: CXC162058 R5A01
Organizer Version: CXC162036 R6D23

The Vodafone P990 phones ships with Organiser Version R3B01 which in now very VERY old. It is easily changed if you check on Google. (worked for me)

There are still a few bugs with the new firmware but I have to say it seems more stable, for now.

I guess we'll have to wait until the P1 is released before they (SE) incorporate any new features ie. SIP Client, Today Screen.