Attempting to install using these directions
First problem I had was with url for the repo key, which I correct the wiki for. (but maybe someone can confirm I did the right thing)
The next problem is that the apt-get update step has this error:
W: Failed to fetch http://bigtop.s3.amazonaws.com/releases/0.5.0/ubuntu/precise/x86_64/dists/bigtop/contrib/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://bigtop.s3.amazonaws.com/releases/0.5.0/ubuntu/precise/x86_64/dists/bigtop/contrib/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
After looking at previous version directions I see that 0.4.0 used this apt list file:
Changing the version number there to 0.5.0 got me past the update step, but the packages are unsigned.
Perhaps the correct action is to sign and upload packages to S3?