Lightroom 3.5 and Camera Raw 6.5 are now available via the update mechanisms in Lightroom and Photoshop, as well as being available for download from the Adobe.com updates page.
This is a newer version than the release candidate, fixing bugs logged since the RC release.
As well as bug fixes, there’s support for new cameras, including the Hasslebald H4D-60, the Phase One IQ140, 160 1and 180, along with recently released Sony cameras. There’s also news lens profile additions. A full list of cameras, lenses and bug fixes can be had at the official announcement at Lightroom Journal.