The newly released Microsoft Dynamics CRM V3C has an official build number of 3.0.5300.1361. This download is indeed the full installation of the client that will eventually be replacing CD 2 of CRM 3.0 RTM product. I can't think of a reason to continue to use older versions of the client or even the client update rollup one.
The team worked really hard to get this out before Christmas. Because of the extra hours put in to 'Make it so' and due to Christmas, I'm guessing this place is gonna be a ghost town. It will be nice for some of these folks to get reacquainted with their families and friends.
Happy holidays everyone!