Nokia has outlined its side of the brave new world we’re undertaking tonight, offering up some details about what’s to come for the mobile hardware giant.

First, as expected, Nokia is streamlining its executive staff and operations.  The first to go is Alberto Torres, former Executive VP of MeeGo computers and mobile solutions, and the only one (so far) listed by name as stepping down as he “pursues other interests outside the company”.

Nokia is betting heavily that they can speed up company operations.  In a joint release by Nokia CEO Stephen Elop and Microsoft CEO Steve Ballmer, the two almost became lyrical at the thought of a new Nokia:

Today, the battle is moving from one of mobile devices to one of mobile ecosystems, and our strengths here are complementary. Ecosystems thrive when they reach scale, when they are fueled by energy and innovation and when they provide benefits and value to each person or company who participates. This is what we are creating; this is our vision; this is the work we are driving from this day forward.

There are other mobile ecosystems. We will disrupt them.

There will be challenges. We will overcome them.

Success requires speed. We will be swift.

Together, we see the opportunity, and we have the will, the resources and the drive to succeed.

As of April 1, Nokia will split into “two distinct business units”, Smart Devices (Windows Phones, Symbian smartphones, MeeGo computers, and strategic business operations), and Mobile Phones:

Mobile Phones will drive Nokia’s "web for the next billion" strategy. Mobile Phones will leverage its innovation and strength in growth markets to connect the next billion people and bring them affordable access to the Internet and applications. The Mobile Phones unit will be led by Mary McDowell.

Navteq, which Microsoft already uses extensively for its Bing Maps imagery, will remain a separate reporting entity, and the press release lists out the rest of the corporate structure.

So Nokia looks like it plans to retain both the MeeGo OS, at least in some form, Symbian, and also add Windows Phones.  Rumors are rampant that Nokia already has Windows Phone devices ready to show, including the as-yet-unreleased N9.