Blogistan is catholic in scope but varied in quality. Here's some of the things that I read regularly, and that frequently repay the visit:

Metafilter is probably the broadest in scope, mostly because it is sustained by a community of over 20,000 members, who are free to post and discuss 'the best of the web'.
bOINGbOING is probably the most widely read blog out there, and is full of useless, useful and intriguing things.
Drunkenblog is the most interesting site on computer related, mac specific matters. Drunkenbatman writes very in depth articles which don't underestimate his reader's intelligence and consequently its possible to actually learn something quite new. Plus he likes picking the occasional intellectual fight, which makes for some good drama.
Inhabitat is ikea's website of the future. Its showcases design related matters, materials and products that make you go ooh and ahh in the appropriate places.
Digital Photography Review is the principe source for news on digital photography. The reviews are indefatigably in-depth (often 20 long long pages) but, like a high school teacher near retirement, usually lack any real criticism of the products, making it difficult to judge the quality of some characters. Fortunately, they include a lot of metrics (comparative graphs, charts etc) inbetween the paragraphs where it is possible to find substantial differences.
43 folders is the geek enthusiasts site for productivity and general tips on living easily and well.
Future Feeder brims with techno-junk of the highest order. Interesting research, web projects and future technologies spill from the pages and are often visually oriented.
Girls are pretty delivers daily paranoia and vicous hilarity through the magic of the interweb.
Fafblog does this too with an unholy trinity of characters with more satirical teeth.
Earthbound Light Photography Tips are once a week titbits and insights into digital photography.
Photoshop News does exactly what you'd imagine from some of the important folks in PSland.
Apple insider is a good source for the usual rumours, developments and general appleness.

There are many others that are growing on my RSS reader list (mac folk try NetNewsWire, 'lite' version at the bottom of the page) but I think I've wasted enough of your time with the little list. (RSS readers strip the styling of the website and place the content in one convenient location, kind of like a more specialised web browser. I'm sure there are wintel versions but I really don't know about them).