The easy, obvious answer is yes. Nokia's agreement to buy Trolltech for $155 million has to be a big win for mobile Linux.
But wait, cynics will say. Do open source developers trust Nokia? Might they throw some proprietary junk into this code, or mess about with Trolltech's open source ethos in some other way?
Isn't this just like the car that runs on water, that the car companies bought and suppressed?
Please back away from the tinfoil hat. Trolltech has produced a letter to the open source community, specifically allaying those concerns.
More important, Nokia really does need both Linux and open source to compete. OpenAndroid notes that QTopia gives Nokia the platform it needs to compete with Google, and its Qt is used by Google Earth.
To become material Nokia has to invest in Trolltech. To make this deal pay Nokia has to become more closely aligned with both Linux and open source.
And that could become a very big deal.