Absolutely right. It is important to recognize that both Matlab and R are much more than just languages. I would also throw Mathematica into the mix too, while it is a bit slower than Matlab, its numerical capabilities have continued to grow and it incorporates a fine statistics package alongside a quality plotting and graphics package (not to mention its symbolic roots and recent introduction of dynamic gui manipulation).
For julia to be successful it needs robust integration with quality addon packages, starting with graphics and plotting. It also needs good documentation. One thing that annoys me to no end with Python (and numpy, scipy, pylab, matplotlib) is that you have to look at 3 or 4 different websites to look up API and examples. In my mind Mathematica does this right: a single documentation library which incorporates API reference, tutorials, and common functions grouped together. At the bottom of every page it lists related functions and tutorials so it is easy to discover new API calls in the language.
Freedom of publication. But can you afford to pay for the press, the ink, the distribution?
Freedom of broadcasting. But can you afford the license fee for the frequency, the cost of powering the transmitter?
Freedom to gather. But can you afford to take a day of work, the travel expenses? Can you get a meeting place?
This is not a case of wikileaks not being able to afford services, this is a case of wikileaks being denied services from private companies due to political pressure on those companies.
Nature, to be commanded, must be obeyed. -- Francis Bacon