Yes, awards — especially an Oscar — can bolster winners' careers, but during the long slog, there's tedium, exhaustion and missed work opportunities.Jesse Eisenberg, the star of "The Social Network," was so busy campaigning for Hollywood awards this fall that he couldn't act in an off-Broadway play. David Seidler, the screenwriter of "The King's Speech," has been so occupied with ceremonies and interviews that he hasn't been able to pen a word for months.