I thought I'd make you aware (I wasn't) that there is a new phone software update out. The attached readme file was dated 12 December 2012, so it seems quite recent. It looks like it is a worthwhile update judging by the readme file.
It only updated the phone software (TX) not the mutlimedia (MX) software, maybe mine was already updated.
As many of you would know, this is dead easy to do with a USB stick. Just go to www.bmw.com/update
If you want to see which version you currently have look at Settings / Software update.