Screaming Penguin - Source Does Matter

Opera is a GREAT browser, no matter what platform you use. For me it is the most informative (abotu speeds and content), the fastest and I like the UI the best (opening multiple "locations" in one window.)

The current FREE version of Opera is "sponsored." That is a small ad window is displayed. This is not very obtrusive, and while it sounds totally henious, the way it is displayed you hardly notice it (and of course you can BUY it to remove the sponsorship for $39USD.)

CurrentlY Opera for Linux is rev 5.08 Beta, the release 5.0 comes out tomorrow, tuesday 5.15.2001.
  Opera: Whats New