The Palm Pre, the supposed iPhone killer, is set to launch June 6 in the U.S., and will only be available through Sprint, Palm confirmed on Tuesday, ending months of speculation as to when it will be rolled out to the public.

The launch will be just two days before the beginning of Apple’s Worldwide Developer Conference, a sign that Palm is clearly trying to steal some limelight from Apple's announcement. It has been widely speculated that Apple will feature more in-depth information on the new iPhone OS 3.0 software.

In terms of pricing, Pre will sell for $200, but just like the iPhone, you have to sign up for a new two-year service plan at the time of purchase.

The Pre will work with Sprint's Everything Data plan, Sprint said. That includes unlimited data, unlimited messaging and 450 minutes for $69.99/month, or 900 minutes for $89.99/month. It will also work with the $99.99/month. In comparison with AT&T, for 900 minutes, it costs $109.99/month with an iPhone. That gives you an annual savings of $240.

Sprint also offers free text messaging while AT&T charges extra for it. However, only time will tell if these penny-saving points will actually influence consumers decision as to which smartphone to get between the two.

In terms of specs, the Pre’s specs are very similar to the entry-level iPhone’s, with 8GB of onboard storage, 802.11b/g Wi-Fi, Bluetooth 2.1 (including stereo audio support), a 3.1-inch touchscreen, GPS, and a 3-megapixel camera. The Pre sports a slide-out QWERTY keyboard, a 3.5mm headphone jack, and sensors for ambient light, acceleration, and proximity. The Pre runs Palm’s new WebOS software, which it first demoed at the Consumer Electronics Show last January.

The smartphone will be available from Sprint stores, Best Buy, Radio Shack, Wal-Mart and online.

Visit Palm.com for more information on the Palm Pre.

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