The developer preview is up for grabs now on the newly launched Developer site.There are two kinds of builds available over the Developer site.First is with Developer tools and a 64 Bit version while the other version is Without the Developer tools in 32 bit as well as 64 bit version.
Here are the details of the Developer Builds that are up now on the site dev.windows.com
Windows Developer Preview with developer tools English, 64-bit (x64)
- 64-bit Windows Developer Preview
- Windows SDK for Metro style apps
- Microsoft Visual Studio 11 Express for Windows Developer Preview
- Microsoft Expression Blend 5 Developer Preview
- 28 Metro style apps including the BUILD Conference app
Windows Developer Preview English, 64-bit (x64)
Includes a disk image file (.iso) to install the Windows Developer Preview and Metro style apps on a 64-bit PC.
Windows Developer Preview English, 32-bit (x86)
Includes a disk image file (.iso) to install the Windows Developer Preview and Metro style apps on a 32-bit PC.