1] Slot loading CDR-RW/DVD combo drives
2] Same as above with the DVD-R option
3] Battery level indicator icon on the front panel LCD
4] A more functional front panel...
5] Along with FDD and Dual Batt have another swappable module with PCMCIA slot or modular Subwoofer
(see atbear - this may be possible - and it might even sound better if the module is designed correctly)
6] Harmann Kardon speakers made standard. Those sound great.
7] screw on rubber feet - no more sticky ones...these fall off sometimes - I've stuck mine back on with model CA glue and they havent fallen off since.
8] 8 USB ports might be overkill. How about S-Video out in the 5660 as well!?
9] Powered firewire port
more to come as soon as this vodka intoxicated mind comes back down from the clouds...Friday night is not the right night to be making posts to the forums