Hi,

Just going off at a tangent slightly, you might want to have a look at RealBasic (http://www.realsoftware.com/realstudio/) if you're looking at cross platform development. You can code once and compile as Mac OS X, Windows and Linux. I've used it myself maaaaany moons ago and it worked pretty well.

As far as I know (and I don't know much!) it's the only way of creating an app that'll run on all three big OSes.

Rob