Here is a list of frames and components that can be converted to 650b.

Here's a list of 650b conversion and specific parts I got off of:
http://650b.com/
RockShox Rock Shox Pike U-Turn
SyCip Diesel
Specialized '07 Stumpjumper Expert
Manitou X-Vert Air
Haro Xeon
Haro Sonix LT
Ibex Atlas
VooDoo Wanga
VooDoo Bokor
Salsa Cycles Ala Carte
Soul Cycles Titan
Surly 1x1
Rawland Cycles Sogn
Rawland Cycles Olaf
White Brothers Fluid 130 20mm Thru Axle

I got this list from
http://www.650bpalace.blogspot.com/
VooDoo Bokor (newer with sliders)
VooDoo Wanga (newer with sliders)
Soul Cycles Titan
Ibex Atlas
Haro Sonix LT
Haro Xeon
Specialized Myka
Cannondale Prophet (2007+ checked)
Gunnar Ruffian (older with horizontal dropouts)
Gary Fisher Fat Possum
Scott Spark 30
Marin Rift Zone
Kona Unit (with sliders)
Ventana El Chamuco
Azonic Revenge
Specialized Enduro Elite (checked on 2007 model)