New Scientist - A science news site.
Broader Perspective - A blog that does a lot of things. Amongst others: telling you what the future will look like.
TED - A video library of science and inspiration. Well, that's my description anyway.
SuTree - Another video library. This one's more of a mixed bag of useful tips, guides, introductions, and so on.
JSTOR - Is a digital archive for scholars. This and SuTree I'm not too familiar with despite having them in my links for ages. I'll have to change that.
There's a few. I'd welcome more though. These type of sites are pretty damned useful at times.