Libretto's... drool...
I have a Tungsten E2. Nice little unit. Got given it with a Full GPS setup attached (My 'Little' brother (6feet tall, huge, solid muscle) does not get on with "buttony Gadgety" things, bonus for me!).
I like it, but it's no more than a distraction, and a Media player while my SE C905 is being fixed. I can't seem to find a pratical use for it now that the iPod Touch's are out, so I can't annoy apple fanboi's with a Touchscreen media player ;-(
So, it just sit's there, and get's picked up occaisionally, as I'm rarely in Windows enough to use the godawful Hotsync program (Anyone know of a *nix equlvalent?).
For 90% of my portable needs, my rather customised eeePC 701 is just great.