The Intel Integrated is also available on the D630 with the same 1280x800 "WXGA" screen (Dell sucks for not listing resolutions clearly). In fact if you configure the middle system to come up near a MacBook basic system it comes out to $1077 versus the Mac's $1099. You get 3 year MAIL-IN warranty, not on-site and not over night. Plus you get super-shite build quality, no camera, no remote, no DVI, no firewire, no gigabit ethernet that I can tell. Of course you do get the slightly bigger screen and slightly better Intel integrated gfx (though still crap like the Mac's). If you put Vista Ultimate onto the Dell it increases the price $50 to $1127. That would still leave the comparison fair since only Vista comes even close to Mac OS. If you buy the Mac in September you'll likely get a free upgrade to Leopard as well.

The software suite is a great example as well. On the Dell you'll get a boatload of malware and other stuff to uninstall - if experience is any indication. On the Mac you get a software suite which Apple sells for $79 but is easily worth three times that.

Anyway, bottom line is that in the US and Canada the prices are generally negligible for system that are "sort" of similar.