Drupal supports RSD, thanks to breyten. RSD is Really Simple Discovery, and is a way to help client software find the services needed to read, edit, or work with weblogging software…
Is Mozilla more popular outside the US? See what mozillaZine has to say about it. I know in my household we prefer gecko-based browsers, and only resort to IE when clueless developers of required sites force it upon us. These sites are always send a nice little email complaining about the requirements to use said site. I’d encourage all users of sites that someone ‘require’ IE to complain about it.