From http://www.postgresql.org/about/press/faq :
Q: What is the current version of PostgreSQL?
A: 9.0, which was released September 20, 2010.
...
Q: When will 9.1 come out?
A: The PostgreSQL project begins work on the next version of PostgreSQL in July of each year, and it generally takes 12
to15 months to work to a release. So expect 9.1 sometime in mid to late 2010.
Shouldn't it be 2011?
Best regards,
--
Vladimir Chukharev
Tampere University of Technology