unlike Adokimus, i believe someday it will be offered. In my line of work, a 10key pad is a must, and it is frustrating to have to carry a external 10key pad around with you everywhere you go. Its the little things that add up over time... like forgetting to bring extra batteries for you 10key pad when you REALLY need it, or leaving the usb tongle at home, or working on a plane table and have to try to make room for my 17' MBP and that 10key pad. For ALL the games i play a 10key pad is a must also, hence why i still use a 1.5 year old HP to play games on over my new MBP.
There is just SO much extra room on the surface of the 17' MBP (i have no idea about the internal workings, just speaking from what i can see) i don't see why they wouldn't. I just bought a hi-res 17' SR MBP and if in the next update they had a 10key pad i would switch in a heartbeat.