I haven't seen Apocalypse Now, but I have read Heart of Darkness, and the subject's been on my mind a bit lately, because in my spare time I've been writing a story that has a bit of a Heart of Darkness-y vibe to it (the Kurtz scene in particular). I have viewed the scene with Marlon Brando, and I always loved the reference to it on Buffy, with Xander's dream at the end of season four. ;)
The last movie I watched was Serenity, the collector's edition dvd with the DTS track. Love the film, even though a few things about it don't quite jive with Firefly when you think about them.