I'm experiencing waiting pains, too. I ordered mine on the 12th of April, and I thought it would already begin production by now. Actually, my CA said it would take about a week before production began. It's almost 3 weeks now with nothing changed.
I contacted my CA today, and he said he'd be able to give me a VIN later this week... He was able to give me a production number several weeks ago, but those are pretty much useless. I know that new MY2013 production starts in August, so who knows, maybe they are really backed up with builds of 2012 models before a month of downtime in July for retooling. I just want my car to be delivered before 4th of July!
2013 X3 28i ///M Sport | 2012 128i Cabrio | 2009 Yamaha R6 | 2010 Mercedes C300 Sport (retired) | 2006 MINI Cooper S (retired)
Occasionally I write about new cars over at TFLcar.com