There are some very strong rumors (and confirmations) floating around the Sea Otter arena for 650b.

Rubber: It seems that WTB might be trying their hand in 650b. The tread of source is the new Wolverine in a 2.2. This tire seems to be an awesome set up of XC but enough dig in soft ground.

Forks: You heard it here - Fox is working on a 650b fork. From a very reliable source this information came.

Bikes: Fuji will be releasing a hard tail later this year probably around Interbike. Following will be Stout their more BMX type brand.