I’m using BloGTK for blogging, GAIM for instant messaging, Firefox & Firebird for web & mail, and Liferea for RSS.
I’m still using Emacs, Inkscape and Gimp. They’re better under GNU/Linux than under the X11 system on MacOS X.
The user interface isn’t as good as MacOS X, but with GNU/Linux that’s up to me. Freedom and responsibility, it’s a groovy combination baby, yeah!