D'oh, Apple always strangely slips my mind when I think of software companies. I added a graph (http://dl.dropbox.com/u/10506/blog/hn-analysis/pct_apple.png). Interestingly, it's the company with the clearest upward trend.

I'd also be interested if there were any correlation between meta discussion and it's affects on trends. So I'd be curious to see ycombinator (and/or hacker news) in the "mentioned companies" section.