In Pictures: 15 coolest gadgets at Macworld/iWorld Expo

The Macworld | iWorld Expo in San Francisco is an Apple lover's Disneyland. Ashton Kutcher kicked things off by plugging his movie "iJobs," but the main attraction is the showroom floor where vendors display their wares, everything from iPad and iPhone add-ons to iOS apps to Apple enterprise gear.

Seidio

By now, you've probably heard that water is Public Enemy No. 1 for the iPhone. Many iPhones have been ruined by washing machines, swimming pools and other watery graves. Seidio, though, offers one of the few waterproof iPhone cases (don't be fooled by "water resistant" cases). This level of protection doesn't come cheap. Cost: $79.95.

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