Or at least a feature I like better on the A55 than the G1/G2/GH1.....
Both cameras have an automatic switch between LCD and EVF. My problem on the Panny's is that I keep the camera close to my body and I am constantly inadvertently switching back to the EVF.
On the A55, depending on what angle you have the LCD set to, the auto switch is disabled. So, when the LCD is flat like a waist level finder the auto switching between EVF and LCD is no longer active. Move the LCD to a different position (flat against the camera or straight down) and it is reactivated.
For me this is a great implementation.