This is a huge leak! Details on the first Dell Windows Phone 7 device have been leaked. Dubbed as the “Dell Lightning”, the device features a sliding (portrait) physical keyboard with a stunning 4.1’’ OLED display.

Windows Phone 7 Series was the official name of the new upcoming mobile OS of Microsoft. It may have sounds catchy for some, but for many, it was tacky at best. And so thankfully, the official Windows Phone account on twitter has confirmed this morning that Microsoft is dropping the “Series” part in the OS name, and so it will be now called as “Windows Phone 7”.

Dan Ardelean of Mobile Development blog has managed to unlock the full experience in the pre-released ROM of Windows Phone OS 7.0 which shipped earlier this week with the development tools for Windows Phone 7 Series. The original ROM as released by Microsoft only allowed access to the web browser (Internet Explorer) and “Settings” but with this hacked .BIN file, you can get access to entire Windows Phone 7 Series experience that Microsoft didn’t want you to see.

Designer Umang Dokey has come up with an awesome looking prototype concept of an Tablet (Slate PC) which runs on top of Windows Phone 7. With an 8’’ screen, foldable keyboard, built-in table stand and a finger friendly OS, this is what HP Slate should have been like right from the start. Video after the jump.

The recent announcement of Windows Phone 7 Series at the MWC 2010 in Barcelona, Spain, created big waves among the mobile phone business community. The new OS is impressive, and has generally been received well by those who got a hands-on the preview devices at MWC.

Just found this out on WinMo.nl website and thought it was worthy of a share. What you see here is a HTC HD2 running one of the early builds of Windows Phone 7 Series. According to the site, the build was working nice and smooth and it was shown running on HD2 to the audience in Barcelona present at MWC.