I have just released two new versions of Tangram to CPAN; 2.08_05, which will become 2.09, and 2.09_01, which will become 2.10. (links will be available as soon as search.cpan.org updates)
The former is recommended for existing Tangram users of 2.08 and below to switch to, to trial new Tangram features such as Tangram::IDBIF or outer join support. The latter is recommended for people starting new Tangram projects, and is mostly a namespace re-organisation and splitting out packages that were combined in single files into a "proper" structure.
Tangram 2.09 is more clear about when the test suite is disabled, which should lead to fewer false negatives on the CPAN testers reports (apparently people think it's a good idea to lodge a test failure report after answering a question "Do you want to run the regression tests?" with No).
Other than that, there have been various fixes and improvements. Users switching from 2.07 and below will notice a much improved TANGRAM_TRACE output and many new features as mentioned in the ChangeLog.
Tangram has a website, a mailing list, as well as a publicly available SVN repository offering access to Tangram and other projects.