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Obama's speech on the debt ceiling, choosing the right office space, Branson's underwater expedition, and more. Obama warns country of risk of default. Last night, millions of Americans watched President Obama deliver his plea to Congress to raise the debt ceiling

Color, the $41-million app designed to share photos with those in your immediate proximity, struck out its first time at bat. MyStream works much the same way, but lets you eavesdrop on friends and strangers' songs instead of pictures.

Google will keep you from sprinting to the bus every morning by telling you when it's actually coming, not just when it's supposed to come. Veteran public transit users know that scheduled departure times rarely match up to actual departures.

Instead of finding ways for our track-tethered trains to go faster, we could just eliminate the track altogether. Friction--it's a real bother, especially for trains.

A zealous Miami law enforcement pro bootstrapped his own app, isee-isay, to support the homeland security motto, "See something, say something." Will DHS help recoup his investment?

These historical maps of Amtrak service show the slow death of America's passenger trains.

Since the elections in November, newly elected Republican governors have been falling over themselves to return federal funding earmarked for high-speed rail.

Tablet computers are becoming more popular for Web browsing on the couch, watching Netflix movies in bed, or reading books on the train. But can a tablet replace a laptop for business travel? To find out, I grabbed an Apple iPad and the Lenovo IdeaPad U260, a new ultra-portable notebook with a 12.5-inch screen, and headed from Minneapolis to Los Angeles

From Video Commenting to iReport Integration, mobile consumers and videophiles are about to have a lot more on-the-go options from CNN.com--and presumably others to come.