online current indexes? [Bob asks]

[Bob]

I get bunch of music magazines and I've still got them from previous years.  Instead of flipping through the pages and tables of contents, I was wondering....

Is there an index of topics online anywhere?  esp for current magazines and journals. 

I would like to be able to take a problem I'm thinking about, look it up in this online index (if such a thing exists), and then go to my own personal stack of magazines from the previous few years and pull the article I want.

Does this online index exist?  I know libraries would have this, but I don't want to go that way for now.  Plus, I doubt the most current issues have made it into the library indexes yet.