I'm somewhat surprised that there isn't a giant 'akrasia' in the middle of all that, but oh well.
What tool was used to make this? You should try it with more promoted articles. The feed in the link contains the last 24 ( http://www.google.com/reader/public/atom/feed/http://lesswrong.com/promoted/.rss?n=24 )
"Singularity people money happiness".... oh dear!
(No hiding the "agenda" there!)
:-)
In all seriousness, however, the image is not an unpleasant one.
I tried it with 500 too, and its pretty much the same.
I created this word cloud based on http://lesswrong.com/promoted/.rss.
The words "Rational" and "Rationality" might trigger negative stereotypes for some people, but this image is positive and inspiring. I'm glad to see we are promoting top level posts on these issues and thought you would be too.