AKAMarketing.com This web site provides an excellent resource of articles and tutorials on Internet marketing and web site promotion techniques.
The Daily WTF Always guaranteed to bring a smile to the faces of commercial software developers, the Daily WTF highlights common (bad) practices in the IT industry in a comical way.
xkcd "A webcomic of romance, sarcasm, math, and language.". Pretty much sums it up!
Security Now! Great podcasts on all things security-related, updated on a regular basis.
FLOSS Weekly It is a long way from being weekly, nonetheless these are some of the best open source podcasts on the Net, very interesting listening!
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