It's always been hard to track toddler-thru-tween obsessions, given their nature to move from Sesame Street to Barney to some anime cartoon to Hannah Montana. That, and we're not 6.

But then Hannah/Miley Cyrus secured a seven-figure book deal, for a book that will be ghost written, and it's like, UGH, maybe these fads are important and we do have to start paying attention.

Look at Mary-Kate and Ashley; they're worth, like, 15 or 20 dollars.

And now there's the huge success of iCarly, a show about a group of tween girls who have webcams.

Though the plotline is every parent's nightmare, the Nickelodeon show draws an average of 3.5 million viewers, with 3.3 million unique visitors to iCarly.com.

For now, the website doesn't feature any advertising, or even a Nick logo (well, it has a tiny one at the bottom). It's built to represent the fictional webcam site the girls on the show created. But in an episode of the show, the girls signed a sponsorship deal with a fictional sneaker company, only to see it fall through because the sneakers were pieces of crap. (Made it China, right Jack Cafferty?)

How healthy, then, that we're teaching our young ones about the potentials of Internet advertising booms … and not the possibility that they're gonna get molested on MySpace.