I looked but not too hard and did not find this detail, but I just got my own K2 today, the better half has hers already but she's up in the PNW for another month or so...anyway, we all know you cannot use the Kindles when connected to your computer via USB. But when I "ejected" the K2i the display when back to normal mode yet the power light remained lit and the battery indicator shows it is still charging. So, this is kinda cool.
But for all I know this is in the user guide, but since nobody reads anymore, and nobody ever reads the manual...I just thought I would pass this along to see if it's already been-there-done-that sorta stuff.
Oh, obviously being the newer K2i it's running v2.3 firmware.