Wow, it seems like it was a long time ago when we started talking about this stuff, and it is finally here. Since you're all (okay, one of you – you know who you are!) asking when I'm going to post the details just like everyone else in the SharePoint e-world, here you go.
I'm pleased to make (err… echo) the announcement that you can download RTM bits of WSS v3 and MOSS 2007 as of 16 Nov.
The MOSS version is an 180-day trial version. When you get your VL (volume licensing) keys, you can enter the VL keys and that is all that is needed to convert the trial license to a non-expiring license.
The MOSS install includes the WSS bits as part of its installation routine. Check the deployment guide for details. Deployment for MOSS 2007.
One of the prerequisites is Microsoft .NET Version 3.0. This is the bit that includes the release version of the Windows Workflow Foundation. Following the steps in the (upgrade) deployment guide, you'll be asked to remove any and all bits of Workflow Beta 2.2 that you might still have on your machine and replace any pre-release version of .NET v3 with this version.
However, you should take care to select the appropriate version (Standard or Enterprise) for your trial, as it is not supported to go from a Enterprise trial version to a Standard licensed version. (See http://blogs.msdn.com/sharepoint/archive/2006/11/14/version-to-version-supported-upgrade-paths.aspx for specifics on version-to-version upgrade). If you want to trial the Enterprise features and then decide to license the Standard features only, this is fine, but you'll have to uninstall and start over with the full licensed Standard version.
The Trial keys are also on the download site, but here they are for your reference.
Go forth and Share.