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Fellow road warriors, we bring you good news: starting today, T-Mobile customers across 55 markets -- including Chicago, Detroit, Honolulu, Pittsburgh, Miami, and many more -- will have immediate access to a faster HSPA+ "4G" network. This means anyone with compatible devices can achieve  theoretical download speeds of up to a whopping 42Mbps, as opposed to just 21Mbps from the good ol' days. But of course, only time will tell whether this upgrade will deliver its promise -- you may recall that evenAT&T's LTE demo last week delivered "realistic" download speeds of up to just 28.9Mbps, when in theory it should be capable of hitting up to 100Mbps. Anyhow, if you want to soldier on and be  a guinea pig  an early adopter, then help yourself to ZTE'sRocket 3.0 USB modem stick starting tomorrow -- the entry price is $99.99 after a $50 mail in rebate, but tied to a two-year broadband plan of 2GB or higher; or you can opt for the contract-free price of ...

SpaceX promised something big, and it's now delivered. The company today revealed its plans for the Falcon Heavy, which promises to be the "world's most powerful rocket." Just how powerful is that? SpaceX says the 22-story rocket will be able to carry satellites or spacecraft weighing over 53 metric tons (or 117,000 pounds) into low earth orbit, which is nearly twice what the Space Shuttle is able to carry. What's more, this isn't just a far off promise. SpaceX says the rocket will be "ready" sometime next year, and the first test flight is planned for 2013. The rocket's sheer size isn't it's only selling point, though -- it also promises to drastically reduce the cost of sending things into space, with each launch expected to cost "only" $100 million. Head on past the break for a taste of what's in store. SpaceX