I’ve had dual monitors for about 8 months now and I have to say its well worth the money. At the office I also have tri screen Dell’s although these arent as big as my dual 22′s which I would say is pretty perfect for me. They offer more space than a 30inch apple screen which is a common choice. In terms of development theres nothing as useful as having the developing environment and the project available on seperate screens, couple that with good desktop management software like Multidesk (Free with ATI graphics cards) dual monitors will probably improve your productivity by 25% or something.
We are just waiting on all the big software vendors to catch up and make proper multi window support for their programs now, firefox two windows is good for blog writing – but there is no formal dual screen support.
