The Writers Guilds (West and East) have released a list of the 101 best screenplays. Its actually kind of interesting, mainly because, most of the movies actually deserve to be on it. I don't know when these organizations actually decided to award films that actually deserve to be awarded, but this is a very good step in the write (haha...get it?) direction.
#77=Adaptation (should be MUCH higher)
#74=Being John Malkovich
#61=The Silence of the Lambs
#24=Eternal Sunshine of the Spotless Mind
#7= Sunset Blvd.
#68=Star Wars (an amazing movie, but the writing...no.)
#28=Shakespeare in Love (well written, but so high on the list?)
Its worth a glance...check it out here...what do you think?