I actually did a lot of research to be able to do this and figured out that the best option is Android believe it or not.

Purchased a Motorola Xoom Android Tablet
Torq app available for Android or Blackberry only, they have a free version but i donated to support the developer because it truelly is an amazing app that by far beats anything i found in the itune store for my ipad.
Bluetooth obdII reader i picked up on ebay and i have been able to do just about everything on my x5, m5 and jaguar xtype.