Hi,
you may be aware of the german iX magazine from Heise, a magazine
"for professional IT".
They are now testing the waters regarding an english version, called
"iX international" - check out
http://www.ix.de/en/
This is to be distributed in PDF format via paid subscription.
The pilot issue is a free download.
As for the german version, I've got my own subscription. They often
have quite interesting themes. Since it's about "professional IT",
Unix/Linux themes appear quite often, though they also talk about
"those other systems".
Greetings, Eric