The OSGeo Live development is coordinated via email and internet chat
(IRC) as detailed on the
OSGeo Wiki.
LISAsoft provide commercial support for the building of OSGeo Live, as well as many of the packaged applications Details at: http://www.lisasoft.com/LISAsoft/support.html.
Most packaged applications have commercial support offerings for them. Use the OSGeo Service Provider Directory or refer to the package websites for details.