Yeah I've been looking for these too but I suspect they are not yet available from BMW.

It took several months for BMW to release the 2007 maps last year despite Sensis releasing them in the later part of 2006.

If I recall the 2007 maps eventually made it out of BMW in the first couple of months of 2007 so I'd be guessing the 2008 will be the same.

Check out the BMW Australia website (go to sitemap and then sat nav) and they state V13 is the latest and link to a Sensis page which shows V14