It's that time of year again for Jim Clavin. He runs a Web site (www.flicklives.com) devoted to Jean Shepherd and his work. And right about now, things heat up. "I usually get 250, 300 hits a day. It's not eBay or whatever," says Clavin, who lives in New Jersey. "But starting about this time of year, the hit rate goes up. . . . Come December, I'll get a thousand hits a day."...