Although it has also to be said (and I'm going to contradict everything which has been said before): In "special" circumstances, Patchou can/will release a Plus!Live version even before WLM is out of beta.
But this will only happen if, and only if, Plus!Live is 99,9999% finished and if, and only if, Microsofts decides that WLM will stay in "beta" for a long time without changing stuff too much.
This situation has happened before, where a Messenger version was so long in beta that many people already used it, or wanted to use it but with Plus!.
Of course, on the other hand again, Plus!Live is programmed from scratch and is based upon a total new engine and must work with a total new messenger engine and major version changes; every bit and bold of the new Plus!Live needs to be checked, double checked and re-checked. This is a whole lot different than when Plus!3 got a simple update to accomodate a very few changes in a certain messenger build update.
All in all and to say yet the same thing (
): have patience, Messenger Plus! Live will be released when it is ready to be released. Patchou will never withhold a Plus! update from the public without reasons and as soon as a version can be released, it will be released!