There are also hotspots in 2 of the screen corners to toggle exposè (the resizing thingie).
I don't remember if these are active by default but you can alwas check:
apple menu > system preferences > exposè and spaces > "exposè" tab (left)
I use it loads,
I have web & email on 1, lightroom on 2, CS3 on 3 and iphoto on 4
I really wish the work comps were macs, could flit between work and skive mode really quick!!
I do the same... the only annoying thing is Photoshop not redrawing palettes properly when moving from space to space.
It's due to Adobe's "non standard" use of the Mac GUI.