OK, surely this must be a sign that blogging is mainstream. Pulitzer Prize-winning Associated Press reporter Walter Mears and colleague Nancy Benac will be providing “running commentary, insight, and news tidbits” from the Democratic and Republican conventions later this summer. Their AP feature, called email@example.com, is being offered to AP clients as part of the wire service’s political coverage, and will open for business the Sunday before the conventions open and run through the final proceedings on Thursday night. This is the first blog to be offered by the AP. Mears has reported from every U.S. national political convention since 1964 and spent most of his 45 years with the AP covering politics; Benac has covered 10 conventions. Mears retired in 2001, so the blog is his temporary return to news coverage.