"In addition to the ongoing long-term usability enhancement
efforts, Canonical and the Ubuntu development community are
focusing on several specific technical goals for 9.04, including
improving performance and boot time and integrating web services
more tightly with the desktop.
"...The Mono stack comes with some very complex dependencies
that make it a bit challenging to package properly. Members of the
community have responded by proposing a Mono 2.0 transitioning
initiative that will involve close collaboration between Ubuntu and
upstream Debian packagers. The goal is to transition all of the
major Mono packages to 2.0 dependencies--a move that will help save
space on the installable Live CD image."