-snip- The former daytime TV star — who recently launched a gay- family cruise line — is trying out a talk show tomorrow night by subbing for Jim Bohannon Bohannon is syndicated by Viacom/CBS's Westwood One, causing rampant industry speculation that the network is testing O'Donnell for her own radio show. -snip- "I think she'd do fine because she's a colorful, offbeat, opinionated character with a showbiz background, but strong interests in politics and controversial lifestyle issues," said Talkers magazine publisher Michael Harrison. "However, radio is very demanding," said Harrison, warning that a three-hour talk show, live each day, is...