I'd like to let you know about this very recent publication by Luca Castagnoli (Durham University):
Ancient Self-Refutation: The Logic and History of the Self-Refutation Argument from Democritus to Augustine (CUP, 2010).
For more information, go here. Some of the chapters deal with ancient Pyrrhonism. Since I had the opportunity to read a draft of the book, I can tell you that it is certainly worth reading.