With MWC right around the corner, all eyes are on Microsoft for the launch of Windows Phone 7. And though we heard Project Pink was in trouble, this FCC filing suggests the Sharp-made Turtle may still be on its way.

The diagram for the model PB10ZU shows a short, stout device that bears an unmistakable resemblance to the Project Pink Turtle images we saw last Fall. The filing reveals that the PB10ZU packs dual-band CDMA, EVDO, Bluetooth and WiFi connectivity. Sharp being the manufacturer for the Turtle is in line with what we have heard from the beginning and makes sense, as they made the original Sidekick for Danger, who was acquired by Microsoft in 2008.

A second device with the model number PB20ZU is mentioned, though considerably less detail is offered. One could surmise that this might well be the Pure, the second, more traditionally-shaped slider that we saw in our original leak.

As Engadget points out, the FCC filing's details are being withheld until March 29, just after the CTIA conference in Vegas. That conference has been rumored as a potential venue for the debut of the Zune phone. Exactly what place the Turtle will have in the Windows Phone 7 line-up remains unclear, though it has been suggested that it is not the star of the collection but rather an "evolution of the Sidekick."

Presumably some of this will come into focus in the coming days at MWC, but until then you can bet the speculation will be at an all time high. [FCC via Engadget]