Quite nice, if I do say so myself. The design is fairly well done. I really like how you can favorite the audio within the flash, instead of on your userpage. This makes it much easier to use and navigate your favorite music, although it doesn't seem to save the favorites.
I really like how you can select to download the song or go to the audio page. It's great that you don't have to go to the audio portal page just to download the track. It's not that major, but I like it.
A lot of the buttons seem very out of place. For example the play, pause, and stop button. Although it's not that big of a deal, the edges aren't rounded like all the others are, so it looks very odd. When you click "Read This!", it has an NG styled button as the background, then one of the default buttons that comes with flash on top of it. Again, that looks quite odd.
The background also looks very out of place, in my opinion. I think it would have been a lot better if it had been one of the default tables, such as the one this review is in. I know it kind of is in one, but the background color isn't the same, and P-Bot looks odd sitting in the background like that. In my opinion it would have looked really cool if you had made styled this more on the NG style rather than throwing in your own style, but again, that's just my opinion.
This is more of a question than anything, but what's the point of the spinning block? It seems rather pointless, as if it was just a project of yours that you threw in for a little extra entertainment value. I kind of think you should remove it, because again it doesn't fit the NG style, but it doesn't really matter if it stays or if it goes, honestly.
If you really care about the spinning block being there, perhaps you could make it change into more colors rather than just blue. It quickly becomes pointless playing with it once you color every block of it blue. In fact, you could probably change it into a rubix cube of sorts.
Unless there's something wrong with my browser, your favorites don't save. In my opinion this is a pretty major thing. You could quickly favorite it on here before leaving to go somewhere, and expect to be able to easily listen to it when you get back, but you simply won't be able to do that due to this.
The favorites and history windows look terrible. They seem to be buttons within buttons. Why not make it into a table, then make it popup like it does on any OS? That would look so much better than what you have it as now.
I'm sure this is fairly obvious by now, but you really should recode this in AS3. AS2 seems to have so many limitations when it comes to creating a radio, it's best to not even do it. Of course I want count off for not doing so, but I think you should.