Yeah, the iPod touch is way thinner and it uses a standard headphone jack.
BTW...I can deal with proprietary charging/docking cables (especially since the iPhone is popular enough that they end up available everywhere anyway), but if they switch to a proprietary headphone jack, I will be finished with the iPhone. And I love the iPhone. I've used Android on my tablet plenty, and I don't want to switch, especially not to a monster screened phablet...but I won't be locked into Apple only headphones. That's a standard that has existed for 30-40 years, and changing it would be absolutely ridiculous.