I spotted this in today's media Guardian and it's interesting reading, especially for bloggers. Jeff Jarvis gave up his "day job" with big media and now earns a (modest?) six figure salary. Not all through blogging, but his blog got him the work.
Jeff writes, "If I add all that up over the past five years and the five to come, to me the blog is worth a few million (dollars, not pounds, sadly). "