Looking for one more excuse to stay inside and avoid that sweltering Las Vegas heat this summer? Good news, gamblers -- Clearwire's CLEAR WiMAX service has officially gone live across 638 square miles in the greater Las Vegas area. By the books, that's serving right around 1.7 million residents, not including the influx of tourists from other WiMAX-equipped cities that will undoubtedly take advantage. To coincide with the launch, Samsung has also announced that its QWERTY-packin', DivX-friendly Mondi -- which we toyed with back at CTIA -- will be available in Vegas-area Best Buy and Clearwire outlets starting August 1st. Said MID arrives with 4G support, WiFi, GPS, 3 megapixel camera, a QWERTY keypad, a 4.3-inch touchscreen, Opera 9.5 and a customizable set of widgets on top of Windows Mobile. The device is supposedly available now through Samsung's website and "select Samsung authorized distributors," but we're having no lucky hunting one down at present time.

Read - CLEAR in Las Vegas
Read - Samsung Mondi shipping

Sure, Clearwire has actually been running its WiMAX network in Atlanta for six weeks already, but that technicality isn't stopping the company from deciding now is the time to "launch" the service in the metro area, with an appropriately-sized marketing blitz to boot. Portland travelers already using the service should feel at home now with their own personal 4G network to keep them company while they engorge on the recommended dosage of Chik-Fil-A sandwiches and Varsity chili dogs. Prices are identical to what we've already heard and, yes, even though the company just quietly launched the service in Las Vegas, expect to see the delayed red carpet rollout for that city sometime later this Summer.

The XOHM label may be gone, but the potency of Sprint's WiMAX network is still kickin' in and around Baltimore. For those itching for wicked fast mobile broadband outside of The Charm City, Sprint has just unveiled a slew of expansion areas that'll get gifted in 2009 and 2010. As for the rest of this year, folks in Atlanta, Charlotte, Chicago, Dallas, Ft. Worth, Honolulu, Las Vegas, Philadelphia, Portland and Seattle can expect Sprint 4G rollouts, while residents of Boston, Houston, New York, San Francisco and Washington, D.C. can be on the lookout in 2010. In related news, the carrier is also taking this opportunity to reveal that it has "several new 4G devices planned for 2009 and 2010, including a single-mode 4G data card, embedded laptops, a small-office-home-office broadband modem and a tri-mode phone." Lovely.