A lot of information has been removed from the site because it is simply too much work to maintain and keep up with it. Instead of trying to keep this page up to date here are some of the best sources for information (which is where much of it comes from to begin with):
Here you can find a lot of information regarding drugs. It has everything from their effects, how to safely use them, and other things people should know if they are interested in, or using recreational substances. It also contains pill reports on bad/bunk pills if you're interested in what kind of E contain what substances, and so that you don't end up taking something that you're not expecting, or get ripped off.
This GNC site contains tons of information about vitamins, minerals, herbs, etc. that you can use for pre-loading and just to keep you healthy in general. Very useful for looking up information on the legal substances ;)
"A print periodical dedicated to the study of psychedelics, expanded consciousness, and the science of reality and perception. The goal of TRP is to provide a public forum for the discussion of entheogens, to investigate modern psychedelic trends and culture, and to disseminate accurate information about entheogens and their use."