So last year, I was really bummed to hear that one of my favorite music magazines, Blender, was going out of business. But I just remembered that they re-launched the website after the print version was no longer. So just a heads up if anyone didn't know, Blender's still a publication, just online.
EDIT 4/21/2010: So I've thought a lot about this after searching the site and realized, there's a reason why Blender went under. They just aren't as good as they used to be. What happened?! Their lists were the best!
Some other music magazine's out there? Besides the staples (Rolling Stone and Spin,) there are some really great publications out there to look for new music, both in print and online.
Paste - Even though they could be on their way out (they continue to ask for donations from avid readers and subscribers,) Paste is good for someone who is into either alt-country (Ryan Adams, Avett Brothers, Gillian Welch,) or mellow indie like Death Cab for Cutie or The Decemberists. They also are fans of Fiona Apple, Regina Spektor, Radiohead, Neutral Milk Hotel and etc.
Pitchfork Media - Probably my favorite online music website, Chicago's Pitchfork covers almost every genre of music, as long as it's indie. The website is designed really well and is easy to navigate. I especially like that they have a music player on their website so you could actually listen to the bands you're reading about. Also, I'm a sucker for lists and top 10's/20's/whatever...and they have a lot of those.
Prefix Mag - While their website could use a little work, (it's a little busy, don't you think?) Prefix Mag has a lot of freelance writers all over the world so they naturally have a lot of information about bands and they have it quick. Another great thing about this site is that there are no barriers when it comes to music genre's, they write about anyone from Taylor Swift to Dr. Dog. I can definitely respect that.