It's a small effect, and it's not really surprising, but if you look at a graph of the relative search volume for the phrases linux wine linux photoshop linux warcraft linux steam it seems that each time a new big app starts working on Linux enough for people to start searching for it (photoshop, warcraft, steam), the number of queries for linux wine goes up a little bit.
http://www.google.com/trends?q=linux+wine%2Clinux+photoshop%2C+linux+warcraf...
I'm just pleased to see that the effect is measurable, and not lost in the noise...