This is kinda wierd... I thought they made the Z-line specifically for "widescreen" business laptop? IMO, widescreen on notebook is kinda gimmicky. The screens are too small to be practical in productivity. Sure, you can try opening 2 documents side-by-side, but they both end up being very small to look at (I've used the 15.4" WS on X1000), and the loss of vertical real-estate is PITA when you're coding. Widescreen in 20"+ makes much more sense, as the real-estate on those screen can afford the side-by-side viewing without having the material being too small, and loss of vertical space isn't too great.
As for lack of firewire, it doesn't affect me much and probably the intended consumer of T-series. The T does lack a bit of connectivity option. It's also even odd that T-60 dropped the parallel port and serial port, but didn't add much more to replace those lost ports compared to T-4x series.
All laptop should have DVI out as default. They can simply add the DVI-VGA adaptor, if the user needs VGA.