I'm in the UK, and I'm only getting 30 seconds for the WKAP songs as well. I'm assuming it's for copyright reasons (just like I can't get any of hulu's content here), but I don't know for sure. I didn't notice it before, so I'm wondering if this is a recent change.
Then again, if I really wanted to find out if I liked an artist, I'd look around online some more, which is what this chick should do instead of whining about Myspace. Amanda has some of her videos embedded right on the Myspace page, and they're all on Youtube AND Vimeo in outstanding quality. I'm sure this wasn't Amanda's decision, but the point is, her music is still out there. If this chick took the time to bitch about it, she should've had the time to clicky-click her way to Youtube.