I've been working on a presentation for our next User Group meeting on Continuous Integration, and wanted to set up a local Subversion server. Of course I wanted to use the latest and greatest versions of everything. So I've been checking back daily for the appearance of the installer for Subversion 1.5.1 for Windows. Setup-Subversion-1.5.1.en-us.msi showed up on August 15, 2008.
I found this CoDe Magazine article by Rick Strahl very helpful for setting things up initially. Setting Up and Running Subversion and Tortoise SVN with Visual Studio and .NET