Placed my order just this week. Talked to my dealer today (Stenshagen Sk°yen), and they confirmed that its most likely to be locked today or tomorrow.
Told me to estimate a delivery date in week 10, but to be realistic I guess mid march is more probably.
Its a really tough decision waiting for the new navi or not.
My dealer told me just now on the phone though that the new iDrive probably is a long way away still, but the new navigation might be in place in march.