I'm looking for a PPA with the latest and greatest version of GCC. I'm too scared to switch to something totally unstable and knock my production system out of wack, but want the newest version of GCC. Additionally I don't want to waste tons of time building my own version of GCC.
This is documented here: https://wiki.ubuntu.com/ToolChain
The toolchains that are currently being used to build 12.04 should be there, I think, although that page is slightly out of date.