The answer is yes,
saxondale. can run two 1920x1200 24" LCDs from his 15" MBP.
product information
That's new apparently. I was talking about the ones you can actually buy now, and my statements were correct.
So first of all, that one you linked to is not even available for purchase yet. Second, there's no clear answer if 2x 24" will work on OS X. It says "system dependent." Then it also lists resolutions in a table that say for Windows only, but more resolutions in a table with no such disclaimer. It also says your display driver has to support that double-wide resolution because -- and this is the really important part -- your system sees anything connected to those Matrox boxes as
one monitor. That, and I'm guessing, based on the prices of their other boxes, this thing is going to cost at least $350, probably $400.
So I still think the Matrox boxes are a bad idea, even though they apparently have some coming in DVI form. Rather than buying two 24" monitors (2x ~$650 on a good day = $1300), plus this stupid Matrox thing ($400+), which will total at least $1700, just buy a 30" display. Less hassle, larger screen. I know not quite as many pixels as 2x24", but I still wouldn't mess with these things. Imagine the issues you're going to have when OS X can't tell the two monitors are actually two separate monitors -- dialog boxes popping up across the two displays, you can't have your dock centered, you can't use notification systems that automatically pop up in the middle (like built-in volume, other Bezel notifiers, etc)...it's just going to be really annoying.