John Baez has been invited to write a short opinion piece for the Notices of the AMS to report about the maths blogging phenomenon to the wider mathematical community, and in the spirit of that phenomenon, has opened up a blog post to solicit input for that piece, over at the n-Category café.  Given that the readers here are, by definition, familiar with mathematical blogging, I thought that some of you might like to visit that thread to share your own thoughts on the advantages and disadvantages of this mode of mathematical communication.