I use iGo and Gomadic. Both work fine for iPod, Touch and iPhone. I'm even using 'em overseas, with a transformer. I've used 'em to charge in the U.S., too. They work with my Kindle and Garmin GPS as well, with the right tips. I have a Touch 4, which uses the same tip as iPhone my 3G and 4, and my aged iPod 5.5 with video.
If you've got an iPad in the family, I highly recommend the Griffin PowerBlock wall and car combo. One set charges all my iStuff, quickly.
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