A great set of guides and resources is now available on Technet here.

These are as follows:

• Editor’s Note: Extending SharePoint to the Cloud
• TechNet Magazine: Get Started with SharePoint Online
• Microsoft SharePoint Online White Paper: An Overview for Enterprise IT Professionals
• Free eBook: Microsoft Office 365: Connect and Collaborate Virtually Anywhere, Anytime
• MSDN Magazine: Cloud-Based Collaboration with SharePoint Online
• SharePoint Online Planning Guide for Enterprises
• SharePoint Online Planning Guide for Office 365 for Professionals and Small Businesses
• SharePoint Online Administration Center Guide
• Webcast: End User Tips and Tricks for Office 365 – Focus on SharePoint Online
• TechNet Radio: Extending SharePoint Online’s Social Networking Capabilities

The page describes each of the areas – Many favorites are the SharePoint Online Planning and Admin guides 🙂 :p