There are famous living writers who blog, including but hardly limited to Carmen Boullosa, Laila Lalami, and Cristina Rivera Garza. James Baldwin, who is not living, maintains a page on MySpace. But did you know that pre-20th century figures such as Walt Whitman, Henry David Thoreau, and Samuel Pepys were also blogging? Do you know of any others?
Axé.
coldhearted scientist وداد 
Jon Swift
Yes but does he count since he’s not actually blogging in the other JS’ words?
(See Borges, “Pierre Menard, autor del Quijote.”)
Pretty close, Profacero.