Sacramento artists of all sorts have been asked by Richard St. Ofle and Jesse Vasquez to contribute to a weekly "participatory art project" on their new blog, "Topical Thursday." On "Topical Thursday," Sacramento's most creative are asked to consider a topic and contribute their interpretation, in whatever form they choose, to the blog. According to St. Ofle, the contributors will be "mostly artists, but also writers as well . . . we wanted to limit it to people who do something creative, but not just visual art." St. Ofle and Vasquez, themselves artists, reveal a new topic every Thursday, as the blog's name implies. Past topics have included "guilty pleasures" and "secrets." Upcoming