Associate NeoOffice with .xls files
Putting this bit of tech knowledge on my Agaric blog in the hope of speeding other folks to open source nirvana...
Right know the best search engine hit is a blog that's just a tease ("Even found the magic dialog box that let me permanently associate NeoOffice with Office file extensions.") -- and the service it's on, called Multiply, requires the full invasion-of-privacy log-in.
In your Apple Macintosh OS X Finder select an .xls files and "Get Info" (control click for dropdown list or Command-I). Expand Open With and choose NeoOffice. Click Change All, and tell it yes, really. Do the same for .doc or .rtf or any similar extension you want to always open in a given application.
~ your friends from Agaric Design Collective, open source web development, showing the way to open source free software on Mac OS X, among other places.