How much do freelance translators actually earn?

A nice post by Corinne McKay on her blog Thoughts on Translation about how much freelance translators actually earn, and how we gauge whether it's 'enough'. A good discussion in the comments, though it's a tad dispiriting to hear the 'things will never be as good for the new generation' shtick... Luckily, people have been saying that for so many thousands of years that I think we can treat it with gentle scepticism.