i don't know if you' seen 'em but two of Richard Linklater's (highly praised) earlier films 'Before Sunrise' & 'Before Sunset'. Brilliant movies! Feature in Waking Life for one scene. The two characters in bed talking. I didn't realize 'till the second time i watched it but i thought it was cool. Both those movie also have the same style of kinda' stream-of-conscious-thought conversations. absoloutly brilliant films. if you like this movie you'll like these too.
p.s. if you have seen the last one the scene with them in Waking Life is almost a tribute to all those who saw them. Like a sequel in just one scene lol