A few weeks ago I wrote a blog about some information to be used for self education and how to improve your learning skills for junior testers. I want to provide you some more information. Below a list (and URL) of magazines which contain a lot of information about software testing which can be downloaded for free (but you have to get a subscription first).
The Testing Circus : http://testingcircus.com/
Testing Experience : http://www.testingexperience.com/
cOre : http://www.coremag.eu/
The Testing Planet : http://www.thetestingplanet.com/
Software Test & Quality Assurance : http://www.softwaretestpro.com/
Agile Record : http://www.agilerecord.com/
Better Software Magazine : http://www.stickyminds.com/BetterSoftware/magazine.asp
Professional Tester : http://www.professionaltester.com
Logigear Magazine : http://www.logigearmagazine.com/
Methods and Tools : http://www.methodsandtools.com/
SD Times : http://www.sdtimes.com
Tea Time With Testers : http://www.teatimewithtesters.com/
TEST Magazine : http://www.testmagazine.co.uk/
Most of these magazines have good articles about the software testing business, written by testers we all know, like Michael Bolton, James Bach, Matt Heusser, Marcus Gärtner and new writers like Lanette Creamer, Adam Yuret, Michael Lawson, Bernie Berger. A great source of information that will support your ongoing self education and for sure improve your skils.
simonsaysnomore 
Good to see Testing Circus in the list. Thanks for including in the list.
~Ajoy Kumar Singha
http://testingcircus.com
Interesting list! Thanks for sharing
It was a bit tricky finding the Better Software Magazine subscription page, from the link in this blog post. I instead googled for it:
http://www.stickyminds.com/BetterSoftware/magazine.asp
Updated the blog with your suggestion. Thanks