The Champions Online headstart began today, and even a little early as I was able to log in around 0930 this morning. The cool thing is that there will be an event for the duration of the headstart up till the actual release of the game. I was able to play some before the server booted me off, maybe it melted from all the players trying to log in at once, who knows.
There were a few last minute updates to the game including raising the XP from mob kills, something many on the forums were asking for. But I did notice that some bugs carried over from the beta into to the live client. Still, I'm having fun.