Has anybody found any?
So far I have:
(On examining a skull in the voodoo ladies shack) "Murray?" - Reference to the talking demonic skull in CMI and EFMI
(On examining the pillar by the glass blower's house) "I lack the necesary education, fedora and jacket to understand these marking" - Reference to Indiana Jones
Chuck the plant on Elaine's ship - Reference to Maniac Mansion