If you haven't been on the Twitter today, you might have missed this nugget from Mayor Sam Adams' office:

Wind-power giant Vestas is going to set up corporate shop in the Pearl District, turning the long-empty Meier & Frank Depot Building into a palace of green-technology palavering.

Construction could begin as soon as October, with Vestas' newly minted "North American sales and service headquarters" ready for business in early 2012. Portland-based Gerding Edlen Development is handling the $66 million project, expected to achieve the coveted "platinum" certification from the U.S. Green Building Council.

Of course, Vestas—and its hundreds of jobs—isn't staying just because it thinks were a neat-o place to preach the green gospel. To keep Vestas from straying to other cities, Portland is giving them an $8.1 million interest-free loan and the state is offering $2.25 million.

What makes it so green? And what does this mean for Adams? Keep reading

The 1927 building, whose historic facade will remain intact, will boast (seems like the right word) a rooftop solar array larger than any other downtown. It also will have something called an "ecoroof," which I presume is good for making the air cleaner, and not quite as hot on those rare days (or weeks) when it actually gets really hot here.

This is also a victory for Adams and his relentless mantra about building the city's "green economy." http://pdxeconomicdevelopment.com/

According to the announcement of the deal, in the works for some months, 400 jobs (counting Vestas' current home base on Naito Parkway) will be preserved and 450 construction jobs will be created. Also, with all the new space, Vestas could add as many as 450 more employees.

Vestas has had its corporate HQ in Portland since 2002, moving here from Palm Springs, but so far hadn't been ready to commit for the long-haul.