Spotlight and Dashboard and Mail 2.0 etc. may all be cool and sexy crowd pleasers, but the Tiger feature that has made me the most happy so far is so small that you almost don't see it at first: It's modifier-key remapping, built right into the Keyboard & Mouse System Preferences panel! Yes, uControl has been enabling this feature for many dot releases now, but it's great to see that Apple finally decided that it was important enough to support out of the box.
To access it, bring up System Preferences, select Keyboard & Mouse, and then click on Modifier Keys...
You can now remap Caps Lock, Control, Option, and Command to your heart's content! My only remaining wish is that you'd be able to control them on a per-keyboard basis, just like in uControl -- my internal and external keyboards have different key layouts. Oh well; I guess there's always 10.4.1...

