Ahhh, World names. I like simplistic names.

Lets look to what we call out world: EARTH. Named because of the land, the ground the earth on which we stand.

The World of Greyhawk is named Oerth as slight variation of our own world.

The world of Faerun and the Forgotten Realms is known as Abeir-Toril or sometimes just Toril, meaning 'Cradle of Life'

I have just finished reading the entire World War/Colonization series by Harry Turtledove (a great read, and I highly recommend it). In the books, the home planet of the aliens is known simply as Home, and our planet is called Tosev III (as Earth orbits the Star Tosev in their language/astronomy). Other planets in the Races empire is Hallasi and Rabotev.

So, funny names aside, I believe a planet name should sound realistic and have some sort of Meaning (like Earth/Oerth, Abeir-Toril, or Home).