dlloyd, I guess you've never tried to work like that.
Mirroring is one thing... it doesn't matter, then... in fact, it woudl be decidedly odd mirroring two side-by-side monitors, mirroring is intended for other things... but when you're in dual head mode and trying to do development work, anything more than a fraction of an inch difference in height is very disconcerting. Several inches between the powerbook at desk level and the second monitor would be worse; and then there's the matter of the keyboard, which couldn't be centered unless you used a second one, which would require the powerbook to be pushed very far back to make room for it on the desk....
A powerbook isn't meant just to be 'used on the go' -- it's meant to be a mobile workstation, just like a high end Dell or other PC laptop. If we just needed one for occasional light-duty work and presentations, we'd go for the cheapest ibook.
It seems pointless to spend that much money when you can't dock the blasted thing. If closing the cover knocks it into sleep mode and there's no way to deactivate that, what's the point? I mean, you can hook it up to a plasma screen or to a box light for presentations. Yippee.
This kind of stuff is one of the reasons enterprise level companies don't buy apple. Docking a mobile workstation is a pretty basic thing, and while using a laptop with dual external monitors is less common than doing it with a normal workstation, it's not THAT uncommon, and I'd expect Apple to have been the FIRST ones to offer that kind of functionality.
I DID find one place on the web that seems to sell something that would enable multi-monitor display, sort of (though it still doesn't fix hte sleep mode problem). It's an incredible kludge, though, and would run about a thousand bucks. And the performance hit of two PCI graphics cards running through a PCMCIA slot... doesn't strike me as a good idea.
http://www.magma.com/pci/compatibility/index.html
I dunno. Maybe we'll have to rethink this entirely. Thanks for all your comments, everyone.