I was recently at a CompUSA and looked at the iBooks there. The 12" and 14" models both seemed to have keyboards that were overly flexible, especially by the "E" key. Is this normal? Is it because there was probably no AirPort card installed? How does this keyboard compare to the 15" PowerBook's keyboard? I will be buying an iBook or 15" PowerBook G4 soon (maybe used) and would like a firm keyboard since I do a lot of typing. I have used a PowerBook G3 Wallstreet and really liked that keyboard. Any comments would be appreciated. Thanks in advance!