Google

Google generally does a great job, so they deserve their success wholeheartedly, but I have to tell you: Google's current position as the start page for the internet kind of scares the crap out of me, in a way that Microsoft's dominance over the desktop PC never did. I mean, monopoly power over a desktop PC is one thing -- but the internet is the whole of human knowledge, or something rapidly approaching that. Do we really trust one company to be a benevolent monopoly over.. well, everything?

from http://www.codinghorror.com/blog/archives/001174.html