I see, from your nickname I assumed that you're in Croatia.
So your baby should be ready for some summertime driving, nice!
I was concerned about the facelift of X6 as well as new one coming out, because that's what tends to happen to me when I buy a car. I have a friend in Munich working at BMW Headquarters and I got a word from him that no new version will be coming out at least until 2013.
He also stated that there MIGHT be a MINOR facelift in 2012, but that's still uncertain and will depend heavily on sales in 2011. So there you go, hope that puts your mind at ease...