The SharePoint product marketing team has a list of resources to help you make decisions about hybrid SharePoint environments.
- Hybrid SharePoint Environments with Office 365 New!
- Prepare for single sign-on (SSO) – Office 365
- The main Deploying Office 365 page
- The Microsoft Office 365 Deployment Guide for Enterprises
- SharePoint Online Planning Guide for Office 365 for enterprises
- Exchange Online hybrid deployment and migration with Office 365
For more information, see the official blog of the Microsoft SharePoint Product Group.