Wired

Top of my reading stack: Wired

Wired magazine is consistently one of the best reads, in my humble opinion. The range and depth of articles is unsurpassed. I'm consistently exposed to new concepts and trends. In essence, I learn stuff by reading Wired.

Computer viruses and who finds the patches or fixes for them
Grid computing
MIT's open directory curriculum project
RSS
Genetic research
Computer gaming

Plus, the ads in Wired are first-rate and they have a great monthly hot/not ranking.