Folks at Slashdot have been discussing this:
... the American Chemical Society has launched a new effort against perceived competitors. They are attempting to limit the government's ability to freely publish the results of scientific work paid for by tax dollars. The British journal Nature and the Univeristy of California reports on efforts by the ACS in attempting to shutdown a free database, PubChem, of molecular structures because it competes head to head with the fee-for-service Chemical Abstract Service. Their rationale is that the government should not spend taxpayer dollars on something private business is already doing. Luckily the government has not backed down.
The discussion is an incendiary mix (you wouldn't expect anything else when the topic is chemistry, would you?) of science, government, politics, non-profit vs. for-profit, libertarianism, ..., the works!