The release is reportedly 5384.4, the same release given out at WinHEC 2006, to no ones surprise.
Get The key from microsoft for windows vista beta2 here
Use this link to download using the Download Manager (recommended)

Windows Vista Beta 2 x86 or x64
Direct Link:
• Windows Vista Beta 2, English 32-Bit Edition
• Windows Vista Beta 2, English 64-Bit Edition

Windows Vista Beta 2 German x86 or x64
Direct Link:
• Windows Vista Beta 2, 32-Bit-Edition (Deutsch)
• Windows Vista Beta 2, 64-Bit-Edition (Deutsch)

Japanese x86 or x64
Direct Link:
• Windows Vista Beta 2, Japanese 32-Bit Edition
• Windows Vista Beta 2, Japanese 64-Bit Edition