Want to infuse an old eMac with new life? Linux.com has < http://www.linux.com/article.pl?sid=06/10/24/1817237 instructions > that explain how to install Linux on an eMac.
< http://www.apple.com/macosx/leopard/xcode.html XCode 3.0 > apparently has < http://blogs.gnome.org/view/calum/2006/08/07/0 integrated > support for DTrace with a really slick user interface.