Ubuntu
As soon as I started packing to SFO, I gave away my windows XP laptop and got a new Dell D600, and decided to venture into this new city with a new and untested laptop and operating system.
So, on August 1st I installed Ubuntu, because it was easy, accessible and its premise was decent: for humans.
At about the same time Joi Ito was installing Ubuntu on one of his old laptops. Basically, when products mature there are going to be anough adherents so as to make them ubiquituous and transparent. Ubuntu comes close to that.
Of course, I had to go through all the pain of getting wireless configured, but hey, guess what, it is here!
I remember that I had played with the idea of getting into linux since 1995, when I found a Walnut Creek CD with linux in it. Of course, I couldn't install it - not with graduate school and all my files without a backup. Unlike now, with all the pressure of moving to a new city and all my files without a backup.