Linux is more community-based than Windows and tends to use the Internet as a primary means of communicating — so there are fewer Linux magazines than Windows out there.
I subscribe to Linux Format magazine (future publishing) (http://www.linuxformat.com/
) which is UK-based but available for subscription internationally. The subscription version includes Linux Pro which focuses entirely on Linux in the enterprise/server market, although the main magazine is more general and covers the whole embedded/desktop/server/supercomputer range, and runs tutorials on things like common applications and programming toolkits.
You might also want to look at SlashDot, which is a major news source for both Linux and software generally.