i had a bunch of other things to do today, but instead i sat around and decided to play with kde 4. the guys over at kdemod have made this pretty easy for arch linux users; after adding their custom repositories you can download and install the latest and greatest kde 4 via one command. they've actually been up to this for a while, but the last time i checked they didn't have up-to-date x86_64 packages, and, well, now they do.
this is what i'm talking about. review is to follow.