Been playing a bit recently.
Tried upgrading to Ubuntu Hoary, but broke it. 
Replaced broken Hoary with Fedora Core 3.
Quickly replaced Fedora with Hoary – this time installed correctly.
Fedora Core 3
I departed the Fedora world last year when I found Ubuntu, not long after I’d upgraded to FC2. Then I had to spend a while configuring GNOME to look like GNOME should (i.e. not the BlueCurve style). It was nice to see FC3 GNOME is no longer configured this way. Unfortunately, after experiencing apt-get on Ubuntu, yum (and even apt4rpm) feel a poor substitute.
Final nail in the coffin? There aren’t any ‘official’ (either packaged by Fedora or Ximian/Novell) Mono packages for FC3.
Ubuntu Hoary Hedgehog
Note to self – using dist-upgrade instead of upgrade means that things go so much smoother…
Hoary looks very slick. Having a few minor niggles (can’t edit signatures in Evolution, can’t synchronise appointments/task from my Palm Vx), but on the whole it’s good.
It also has up-to-date Mono packages in universe as well.
Beagle
Inspired by Jono I decided to install Beagle. Following the instructions worked without fault, and I’ve not had the stability issues Jono mentions either.
Very impressive app – I’ll have to try Dashboard next.
GTK#
I’ve also been playing with GTK# development on Microsoft Windows via Paco’s GTK# Installers for .NET. Although not as easy as Windows Forms development (mainly due to the lack of integration with the IDE), something about GTK+ seems more intuitive. It requires much more thought to wire things up correctly, especially if you are using Glade, but that’s not necessarily a bad thing.
I’ve not yet got GTK# 1.9.1 running on Ubuntu, but recompiling my app worked fine, even referencing .NET compiled assemblies which had just been copied across.
All-in-all, a productive few days.
Installed Beagle on Ubuntu Hoary last night. Much easier than what was required from the Warty install.