Comcast tried to give wireless a go several years ago. It failed. It pulled out of wireless, sold its spectrum and was done. Now, wireless has expanded and changed, and competitors like AT&T's U-verse and DirecTV are using wireless to deliver television programming. I'll bet Comcast now wishes it never sold off its wireless spectrum. So, what can we expect from the company going forward in the wireless space? If it jumps in again, will it be successful this time around? Comcast recently acknowledged it was weighing its options in wireless.