The Cheméo crawler is working, working, working. It is a slow crawler, pulling about a page out of the Internet every 3 seconds, respecting all the robots.txt rules not to saturate the indexed databases. But when you do something slowly, regularily, without interuptions over a long period of time, it works.
Cheméo is now indexing more than 70,000 molecules and this will not stop.
You can take a look at the latest index statistics about the chemical properties.