I like your list, but its still a bit hard to distingush planet names when there are numbers next to them, so I spent an hour and scoured wikipedia to make my own altplanetnames file. It is only 306 planets long, but that should be enough to not see too many repeats. I used the following sci-fi series and authors to provide planet names.
Heinlin
Stargate
Firefly
Hitchhiker's guide
Ender's Game
Vorkosigan Saga
Uplift Series
Transformers
Star Wars (movies only, someone want to add all the ones from the books?)
Star Craft
Star Trek, though most was left out (due to their naming convention of only naming stars and the planet's number is how many planets out from the star it is. In practice this is hard to use in-game, so if someone wants they could pick out just the un-numbered ones or find a way to clean the list at
http://en.wikipedia.org/wiki/List_of_Star_Trek_planets:_A-B#A )
Alien (movie)
Battlestar Galactica
Babylon 5
Dr Who (limited to just the one from movies/tv)
Red Dwarf
Robotech
Halo
Homeworld
Star Fox
Dune