I'm a hopeless gadget freak and enjoy trying out all the new devices. It can be a distraction at times. If you read David's newsletter in the archives about "Organizing Junkies" you'll see how easy it is to get caught up in playing GTD than it is to actually implement and use.
He also talks in his book about some of his best ideas have came when playing with his Palm or writing with a new pen.
I get caught up sometimes in playing when I should be doing but some of the new technology is very helpful in getting things done. Even David switched to the Palm Tungsten a while back because he found the voice recorder function helpful.
Hope this helps and enjoy your new Palm or Pocket PC if you get one.