Free Knowledge?

Wikipedia founder Jimmy Wales writes:

You have proven that Wikipedia matters to you, and that you support our mission: to bring free knowledge to the planet, free of charge and free of advertising. You've helped make and keep Wikipedia available for the whole world.

I find it interesting that he still calls it free knowledge just after acknowledging that

Since July 1, more than 125,000 of you have donated $4 million. In addition, we've received major gifts and foundation support totaling $2 million. This combined revenue will cover our operating expenses for the current fiscal year, ending June 30, 2009.

C'mon Jimmy. Wikipedia is not free! And that is ok.

It is free at the point of use, which is quite different than altogether free. In fact, it might be a good example of voluntary income redistribution.