No I haven't seen it yet, I could if I wanted to but to be honest I don't think I do, I too heard it has got good reviews but a movie about Facebook is the LAST thing I ever want to sit in a cinema and watch, I would rather watch Toy Story 3.
I saw Tron and Harry Potter & The Deathly Hallows part 1 lately, I would highly reccomend both of those movies, brilliant!