Debian-based distros are usually the most "ham friendly". Most of the Linux ham radio software is in the Debian repositories. For complete Linux newbies making a move from Windows, Linspire/Freespire are good and I'll also put in a plug for Xandros. Linspire and Xandros aren't "free as in beer" but they are much cheaper than Windows. Once you've got a bit of experience using Linux though you'll find Linspire/Freespire and Xandros a bit "limited" and will want to move on to something else. I've played with many distros although not the "geekier" ones like Slackware and Gentoo...the geekiest I've gotten is Debian Sarge Haven't yet got a favourite. The machine I'm using to type this post is running Kubuntu. If you're running an older machine (Pentium II or earlier) you might want to avoid distros that use either the KDE or Gnome desktops as they tend to be rather resource hungry. The XFCE desktop is pretty good though for older slower machines.