A month ago we showed Fedora crossing out Moonlight and moving Tomboy (with Mono) out of the way, at least as far as the Live CD is concerned. So does Debian on the face of it.
Read the comment here
tomboy: very nice app, but controversial since it brings the
full Mono stack, so we dont make it part of
The background of this is that gnome/gnome-desktop-environment metapackages tend to syncronize with upstream GNOME (and this is why they dragged tomboy in when installed). However, tasksel (i.e. Debian Installer) didnt include tomboy in the default setup.