Not sure it's the best option, but i use the repository of badgerports
About badgerports:
badgerports is a software repository
for use with Ubuntu Linux 10.04.
Whilst on the whole it is a good idea
to use the software provided with your
Linux distribution, there are
sometimes bugs or major software
updates that cannot be included for
operational reasons. badgerports is a
home for a number of wayward software
packages, to enhance the Ubuntu
experience.
The primary purpose of badgerports is
to provide recent versions of the Mono
framework, and associated packages
such as F-Spot, Banshee, and
Monodevelop. Suggestions for other
packages to include are welcome, but
don't be offended if I decline for
whatever reason.whatever reason.
You can find the instructions on how to use it here
