Yes. Exterminatus magazine, written four times a year by Gav Thorpe and Andy Hall.
I'll go over what each one covered. Each issue has a letters page and about 6 pages of colour pictures which go with conversion and painting guides.
1) alien char generators, 2 imperial guard characters, 1 alien character
2) vehicle rules, kal jerico rules & model, a chrono gladiator rules and model, a imperial guard pathfinder rules and model, genestealer cult rules
3) CHAOS!! new chaos psychic powers, hive ganger model & rules, chaos magnus model and rules, Inquisitor Q&A
4) Eldar rules & pathfinder model, kroot warrior rules and model
5) using space marines article, recap of purestrain genestealer rules & new model, a 4 scenario campaign, a space marine helmet sprue
6) Using daemons, daemon huntresses inquisitor rules and model, unbound daemonhost rules and model, tattoo painting techniques
7) Seeing the warp - navigators, their powers and organisation, navigator model and rules, imperial bosun models and rules, playing god - games mastering article.
Each issue costs $7. Well worth it, and a subscriptino for 6 issues is pretty cheap as well.
Oh, and it is still on the go. Inquisitor has a fanatical fanbase - go to its website
http://www.exterminatus.com, then find your way to the forum and ask about it, all i can remember is that its a yahoo! one. I used to be on it, 2 years ago, and it was insanely active - 40 posts to it a day. I quit after i didn't check my emails for a week and ended up with 300 emails in my inbox.