I lost the URL of the article stating this, but apparently the remnants of the GOP in Congress are trying to extend this act to almost all scheduled drugs. Basically this law prevents people from making a "analogue" or a chemical related to and/or designed to cause similar effects of a schedule I-II drug (mostly this occurs with MDMA and amphetamines). Currently this law does not apply to schedule III-IV drugs (meaning some benzos and barbiturates are actually legal to possess without a prescription in the US). However, the GOP is trying to shore up their chances of gaining seats in Congress by passing an extension of the law covering up this seeming loophole, and of course some Democrats are hitching a ride on this crazy wagon. It appears to have enough support to pass both the House and the Senate, and you know no one would attempt to stop this act unless they wanted to commit political suicide.
Damn, and there was some european/russian/asian drugs that I wanted to try just because of this particular lack of legal coverage. Looks like that's out the window in 2010.