We picked up iGo car chargers from the Rat Shack (as I fondly call it) for our Trēos and have been pleased with them so far. They cost the same as the 'official' chargers, and mean that they won't become useless should I change phone types at some future time. I had accumulated chargers from 3~4 generations of Nokia phones -- I was careful to get new ones that were compatible with the old chargers, so they stayed useful, and it was quite handy having 6 wall chargers and 3 car chargers, etc.
I'm looking at increasing my business travel starting this fall, so the notebook charger with the 'extra' tap for other things (like phones, Readers, etc.) sounds pretty attractive. The cost is enough (for a charger, even a fancy versatile one) to make me think about it a while before I jump (before I explain it to the wife, too), I suppose since I'm going to be using it mainly for business travel, I can probably deduct at least part of the cost as a business expense (I expect to acquire a fair amount of that along the way).
