Thanks to Fabian Nappenbach for the tip: Microsoft has released the latest version of its multimedia interface for Windows, DirectX 5.2. For the most part, users don't really need to download the latest version of DirectX, because any game you install that needs it will automatically install it for you. Still, if you just gotta have it, check out the DirectX 5.2 download page.

There's also a link for the DirectX 5.2 SDK if you're a software developer