I definitely second "The Winchester Identity"! That one is amazing!

I also wanted to point you in the direction of one of the upcoming BigBang stories (and after searching through the the summaries and posting schedules posts I can even give you the title, summary and post date lol):

Disaster. (This is a Good One.) by aisalynn
Jared, a college drop-out, unlucky in love and a self-professed "loser" finds himself at the end of his rope. His long-time boyfriend, Misha, has ditched him at the last moment, right before the family Christmas dinner Jared'd planned to bring him to, and thanks to an untimely phone call from his mother, Jared's family thinks Misha is still coming. A series of uncomfortable moments later--including awkward phone calls to his exes, a terrible trip to the mall with is best friend where they were escorted out by security, and a run in with a schizophrenic who thought Jared was trying to take him into a government lab--and Jared has Jensen--an angry, former lawyer who's dedicated his life to charity work--handcuffed in his car, blackmailed and forced into pretending to be Jared's boyfriend. As the holiday stretches on and the charade he's involved in becomes less and less a lie, Jared is only sure of one thing: he should stop listening to Chad.

posting date is July 14th...