So, what does it take to snatch a combined 75% of US mobile internet traffic? Two operating systems, a handful of phones, and one great browser core.

That the iPhone is a massive source of online traffic isn't a surprise—that's been apparent since the week it launched. What's interesting here is Android's rise, which is dramatically quickening, already accounting for a fifth of mobile traffic in the US, when the real marketing push for the OS, starting with the MyTouch ads and the massive Droid launch, is only recently starting in earnest. What is a surprise, or at the very least a Sad Thing, is how poorly Palm is faring. Their tiny sliver of market share might seem understandable since they really only had one new phone for the duration of the survey, but this phone was supposed to be their savior; in the year since it was introduced, their mobile traffic actually fell.

Google and Apple's stark gain in the stats, collected by mobile advertising firm AdMob, is a little less spectacular worldwide, mainly because Symbian's established, but waning, 40% smartphone market share helps it snatch about 25% of mobile web traffic. Still though, two things are clear: Android and the iPhone are who mobile web developers are going to have to cater to, and WebKit, which Symbian uses in its browser too, is basically it.

Anyway, how about a bonus chart! Ever wondered how common the different Android handsets are, which is most popular, and which don't register? Well hello, extra pie:

The G1 is the predictable star here, but the Droid is exploding. [AdMob via Techcrunch]