Sample databases

Is there a good sample database (with decent data volumes) for
postgresql? I am interested in one for learning and automated testing.

I looked at http://pgfoundry.org/projects/dbsamples/ (specifically at
pagila), but it seemed incomplete and not maintained,

I also looked at http://dev.mysql.com/doc/index-other.html. Employee
data (large dataset, includes data and test/verification suite) looks
interesting. Is there anything similar for postgresql?

Is there a dataset used by postgresql development for testing?

If others are interested, I am willing to spend some time in helping
to create one.

--Vraj Mohan