There's a lot of stupid things that myspace is doing, like sending cease and desist messages to sites that their users use to customize their page. That's like car manufacturers not letting aftermarket custom car component companies exist. Or farmers not letting food manufacturers make food.
I've heard from a handful of top executives at web based companies that target our youth as users of their sites, that us blogging early adopter over-thinking over-talking self-important "intelligentsia" are driving a lot less adoption than the youth is driving. Derrick is driving it home.
On a more geeky note, I believe that myspace is publishing RSS, but they aren't pinging anyone. I think most blog search engines are happy about that, because they'd probably have to double or triple their servers to handle it. But, it still keeps myspace a bit of a closed off space from blog search engines. Of course, people could subscribe. But, I wonder how many people actually use bloglines to read a myspace blog? And I wonder how many myspace users are using blogdigger, technorati or feedster. Probably not too many.