I read all I can on computers in the hope that I might learn something :)
In our local paper today this jogged my memory of your query on 2 monitors...now this could be the same info that you already have but here goes :)

Talk about wide screen. US start-up DoubleSight had introduced a specialised monitor fusing two 15inch LCD screens into one 24-inch-wide display.
Compared with two separate monitors, this device takes up less desk space, generates less heat and provides perfectly aligned viewing, though it has an annoying half-inch strip in the middle to cover the two screens share edge.
DoubleSight started selling the monitors on its website (www.doublesight.com) this month. The company is targeting people who already use two monitors - such as accountants who want to view a spreadsheet across two screens or researchers who use one screen to display research and the other to take notes.
"The primary benefit is productivity gain" say DoubleSight chief ec\xecutive Jay Muskovich.
"You dont have to resize the window you're working on"
More people prefers a larger screen on a single monitor instead of using two monitors, according to an IDC survey.
But, while the $US799 (AUS$1135) price for the DoubleSight DS-1500 is less that half the price of large LCD monitors, buying two 15inch displays can cost as little as $US600 (AUS$852)

This is word for word the article and really it means nothing to me, but some of you computer wizzes might get something out of this :)
Bernice