A friend sent me the link to Wolfram|Alpha just a while ago. So far it seems to be a bit lean in textbook-style content in the chemistry area. For instance, when you enter “aromatic solvents” into the dialog box, it returns with
Wolfram|Alpha isn’t sure what to do with your input.
But if you type in “toluene”, suddenly it is the CRC and is flush with data. The stated goals of the Wolfram|Alpha developers are-
Wolfram|Alpha’s long-term goal is to make all systematic knowledge immediately computable and accessible to everyone. We aim to collect and curate all objective data; implement every known model, method, and algorithm; and make it possible to compute whatever can be computed about anything. Our goal is to build on the achievements of science and other systematizations of knowledge to provide a single source that can be relied on by everyone for definitive answers to factual queries.
I do not yet know enough about this resource, but it seems to be a data engine rather than a prose engine.
Landscheidt Cycles Research is a site devoted to the Planetary Influence Theory. This theory pertains to the possible gravitational influence of the planets on solar cycles. it is worth a look.
Watts Up With That? is a blog concerned with global climate issues. The blogger and many of the commentors seem to have their facts straight about global climate change. The site is very data intensive.
If you are a scientist or manage scientists, it is worth considering the file drawer effect.
An online NMR predictor can be found at nmrdb. In my experience the splitting and chemical shifts seem to be in the “not too awful” range.
Lamentations on Chemistry 
In the spirit of “May Linkfest” I’d like to offer up a site that I just recently found while exploring something called the “Muller C Gate”, an asynchronous logic gate used in electronic circuits that does not require the traditional (and power hungry) clocking found in most digital circuits.
I found a link to the University of Hamburg’s “Hades Simulation Framework” and it contains links to hundred of Java applets that implement the basic electronic circuits used in everything from your laptop to your cell phone. The site even has models for memory, microprocessors simple logic gates and a lot of basic logic gates.
And with further ado, I present Hades: http://tams-www.informatik.uni-hamburg.de/applets/hades/webdemos/toc.html
Enjoy
Ps> – Interestingly asynchronous logic circuits do nothing without a change in state. Essentially, a laptop with asynchronous logic simply stops when you aren’t doing anything and instantly wakes up on the first signal. While stopped, the only current that the circuit burns is the leakage current caused by electrons that manage to leak across the transistor because of non-infinite channel resistance.