No idea what there is on the net, I’ve just recently done a course which included him at uni. He has lots of books, the ones I’ve looked at are Spreading the Word (really about philosophy of language, but with a section on ethics), Essays in Quasi-Realism and Ruling Passions. I’d imagine if you had a look you could find articles online. He does the popularising philosophy thing as well, no idea if those books are any good, I’m really talking about his own theories here.
For anyone that is interested, Quasi-Realism is basically the view that moral judgements aren’t descriptive of features of the world, rather they express attitudes, but rather than taking a standard expressivist line we allow talk of moral truth (what this exactly is for Blackburn depends upon what you read, he starts out with a true moral statement being a member of some completely consistent attitude set, then moves towards saying ‘p is true’ being just equivalent to asserting p with greater emphasis) as well as denying relativism - my moral opinion that women should be educated is superior to a view that they shouldn’t. The disagreement between the 2 viewpoints is at the level of 1st-order ethical commitments i.e. we disagree about a substantive ethical matter, but just because all we have is a clash of attitudes doesn’t stop my attitude being better. What is wrong with the alternative attitude is that it is ignorant of the potential of women, it is based upon prejudice etc. As Blackburn himself says, all of this is to ‘talk in our voice’, but as long as our voice isn’t a voice to be embarassed by this is no problem.