COPA, the Child Online Protection Act, has been overturned by the 3rd U.S. Circuit Court of Appeals. This is actually upholding a lower court ruling from a while ago.
It will be interesting to see what effect this might have on virtual worlds, given the parental pressure for safe worlds and the ongoing political crusades, and the continued rise in kids’ worlds (and in kids who try out worlds not meant for them).
Edit: since there is some confusion about this, here’s a link that points out the differences between COPA and COPPA. In short, COPA is the replacement to the Communications Decency Act, and has to do with publishing adult material on sites minors can get to. COPPA is the Children’s Online Protection & Privacy Act, and has to do with collecting personal data from kids.