You can download public beta of Radmin Viewer 3.0 here: http://www.radmin.com/radmin/new/. We are still testing and debugging Radmin Server 3.0. Public version will be released as soon as we're sure that it's stable and has no errors. Famatech is mostly concerned about the quality, so we prefer to delay the release than to come out with some buggy product.
There's no release date for now (there's a floating time frame).
Famatech Technical Support