In his recent post on Configuring the Stack, Jeff Atwood discusses the frustration that comes with installing a complete development environment. 

I'm having a hard time seeing how Microsoft's commercial stack is any easier to configure than the alternative open source stacks these days. Either the open source stuff has gotten a lot more streamlined and mature, or the Microsoft stuff is somehow devolving into complexity. I'm not sure which it is, exactly, but the argument that choosing a commercial development stack saves you time rings more and more hollow over time.

You can read through the comments and see that...

With DotNetNuke 4.5.4 and 4.5.5 having recently been released, we are now well underway on the 4.6 release.  Unlike previous releases we actually started work on some elements of this release in parallel with 4.5.4 release testing.  What has not been decided until earlier this week was the full scope of the release and a target release date.  The exact feature set and release date is still subject to change.

Listed below are the enhancements and bug fixes planned for this release. 

Enhancements

Authentication Providers (DNN-5933) - The authentication provider refactoring includes support for the following authentication providers:  OpenID, AD, Cardspace, DNN.  The LiveID provider has been tested and is waiting on Microsoft to go live with the new service.  The LDAP provider is still under discussion and may be included in this release although the more likely outcome is that it will be released as a regular upgrade through the Authentication Providers projects (formerly the AD Project). ...