While pre-Oscar limousines squeezed in and out of the Peninsula and a political crowd rallied at UTA, an industry power player (who will remain nameless), was fretting over lunch about another problem on Friday: Will the coming months bring a Hollywood writers strike? And, more precisely, which companies will be most exposed if labor peace breaks down? It's too early to worry in any serious way about a possible strike by the Writers Guild of America, East and West…