Richard Franiec today informed me that his Olympus E-PL3 grip is fully compatible with the E-PM1. {} Additional pictures of the E-PM1 with grip could be found here: https://picasaweb.google.com/RichardFraniec/EPM1Grip?authkey=Gv1sRgCL7_h8jhloWhiwE and here: Richard Franiec says E-PL3 accessory grip also suitable for PEN Mini: Digital Photography Review New designation for the grip will be CGE-PL3/PM1. The grip will start shipping September 15 at the price of $34.95 plus shipping cost. Link: Richard Franiec's Camera Accessories
It is extremely comfortable to use & easy to put on. You can use camera safely after an hour. Changes the way you use this camera for the better