http://www.wired.com/ - The popular "Wired" magazine, a good general take on technology. Not very specific however, articles are hit/miss a lot.
http://slashdot.org/ - More towards the computer world, but still an excellent resource. The forums are also filled with useful opinions.
http://www.newscientist.com/ - A great site/magazine for all the happenings in Science & Technology, with a very modern and applicable viewpoint.