Microsoft TechNet Beta Central has opened a Pre-registration portal for the Public Beta releases of Windows Vista, Office 2007, and Exchange Server 12.

So if you’re interested in trying (and learning more about) Windows Vista, the 2007 Microsoft Office release, Exchange “12,” and other upcoming beta software titles, you’ll definitely want to sign up for “TechNet Beta Central.”

With it you’ll gain early access to prerelease code, hot tips, and other exclusive information. Additionally, you will also receive updates and information regularly through the Microsoft TechNet Flash newsletter, from the time you pre-register until the launch of the product.

Sign up now.