Mobility 
Now I am also hit by the mobile work option. I just recieved a notebook from my employer enabling me to do work wherever I am.
In fact, it is quite cool. The notebook (hp) is pretty good equipped and has a 1400 x 1050 display. WLAN and Bluetooth are built in and it's not heavy weight.
But with the standard accu, my iBook will still outlast the runtime and look much nicer while doing so :)