Free your ring, and your iPhone will follow

Here's some exciting news for those of you who have an iPhone and want to have the Star Wars Imperial March play every time your mother-in-law asks you for help installing the latest sudoku game: with a bit of file-extension tweaking and judicious use of the new iTunes 7.4 for Windows or Mac, you can now customize your ringtones without having to donate another 99 cents to Steve Jobs' favorite retirement fund.