Apple's Music Store

So Apple has debuted its much-anticipated online music service, which boasts cooperation from all of the big five music labels. If you're among the 97 percent of personal computer users who are on a non-Mac system, you'll have to wait until year's end at the earliest to participate in the 99 cents download extravaganza.

Or you could go to similar services that have been around for awhile, such as pressplay or Rhapsody. It's not clear yet whether the underwhelming response to these services will be replicated on Apple's platform, which supposedly has a deeper playlist and better pricing. Still, limiting itself to such a small subset of computer users probably isn't a good first step.