Are there online trading companies (like e-trade) that allow you to do real-time trading on a smartphone?

Only online and catalogue companies with a brick-and-mortar presence in your state are required to collect sales tax from you. And, in all those occasions when you buy from 'out-of-state' dealers -- —st states laws require you to track, report, and pay a use tax on online purchases -- —though few individuals actually do this. Tech Tuesday hears about government agencies trying to recover the tax dollars lost every day in cyberspace.

Piracy on the high seas is making big headlines these days. But it's the other kind of piracy -- —e kind that happens online -- —at may actually affect more people around the world. We explore the global fight against illegal file-sharing -- —d learn about a major court ruling against Pirate Bay, a online file-sharing ring based in Sweden.

For several months, many email users have seen a steep decline in the amount of spam they receive. That trend is now over, according to security experts -- —d the spammers' strategies are becoming more aggressive than ever.