Looks like you have to get your order in by Feb18 if you still want one.
http://www.macworld.co.uk/mac/news/?newsid=3423807&pagtype=allchandate
http://www.macworld.co.uk/mac/news/?newsid=3423807&pagtype=allchandate
I don't see a new Mac Pro coming. From what I've heard, they're focusing development on the iMac range and touch-screen technology. Apple don't see the classic "tower" computer as a viable future investment. Just what I was told anyway.
No, Tim Cook has officially confirmed last year that new Mac Pro were due first semester of 2013.