Idea Futures - An innovative idea - trading in speculative predictions
as if they were commodities. Major categories are computing, science, and
"other".
New Scientist: Planet Science - This is general science news, despite
the subtitle, not just about planetary sience. Email these guys to suggest
they change the silly name (and the dippy logo graphic too, while they're
at it). Their Web server is pretty slow, too, and you
have to "register" (get on their mailing list) in order to have full
access. But it seems to have a lot of information.
Eric Weisstein - Eric's home page has many astronomy, math, and physics
links, and also is a base for exploring his "treasure troves" in these
subjects.