Hmm ... if I connect my OV2 to my E-P2 and transfer images, it's slow (and seems to eat battery) but it gives me the option to transfer only new images. ... if I use a card reader, it's really quick and doesn't use the camera's power, but it doesn't give me the option to transfer new images only ... I know others use a card reader only, so I wondered how do they manage this inconvenience?