I'm betting that InfoWorld is rolled into ComputerWorld in less than 1 year. They will "re-subscribe" InfoWorld readers to ComputerWorld, or ComputerWorld will "go pay" and the IDG free magazine era will be over.
That's my bet, they aren't pulling enough advertising revenue and so they're consolidating their lines into a few winners (ComputerWorld), and pushing paid subscriptions (PC World, Mac World).
From a business perspective, probably a survival move in these "fun" times.
I forgot to mention Mac World, PC World, Bio-IT World, and oh yes, CIO.
The www.idg.com website says they have 300 magazines (but many are probably International in nature).
But, the whole print magazine era may be coming to an end anyway...