I've never liked Apple's implementation of application switching via Cmd-Tab (either in OS 9 or OS X). I think LiteSwitch (for OS 9) from Proteron does it much better. Proteron has made LiteSwitch Open Source and is being distributed for free. The CodeWarrior project is available here:
ftp://ftp.proteron.com/pub/LiteSwitch_source.bin
Why am I posting this? Because I'm hoping that someone can port this tiny app to OS X because the Dock doesn't provide good visual feedback when switching applications using Cmd-Tab. If I had any programming skills whatsoever, I'd do it myself. But I don't.
Any takers?