The latest patents from Ricoh, Tamron and Olympus
Ricoh filed patent (2013-7853) for a new 23mm f/2.5 and 27mm f/1.9 lenses for mirrorless APS-C sensor. Not clear if those lenses will be used for the GXR system or for a new GR compact camera
Tamron filed a patent (2012-242690) for a 50mm f/1.8 lens designed for an APS-C mirrorless camera.
New Olympus patent (2013-3288) describes a new i.Zuiko 6-24mm f/1.4-1.8 lens for 1/1.7" sized sensor.