I'm not going to respond to everything, but here's a random sampling of thoughts so far...
-I don't own 2001, but might buy it to use Hal
-That Duke Nukem muzak is hilarious
-I'm definitely replacing Grievious' voice, just don't know with what yet
-Gonna buy Airplane 2 for Shatner's lines
-Palps asking Ani to be the hands, feet, legs, etc. of the Republic is an actual LOL
-I will definitely be giving Anakin Vader lines throughout, just not sure how much...and at some point (probably after he and Sid kill Mace) he'll only speak in Vader lines
-DO NOT WANT for Vader sounds like a winner
-The Black Knight lines for the red Royal Guards will be done if I can make it work
-Leia giving goofy names to the twins, or trying out a bunch of different names? Love it! And settling on Nute for one is a definite plus.
-Weird Al song "Yoda" will make an appearance somewhere
-Snakes on a Plane edited TV line can be done, and I also may have to go ahead and buy Pulp Fiction
-Ghost Nute during birth, genius!
-Anakin dreaming all sorts of different things at different points in the movie sounds fun