Sandboxes and farms
Most custom SharePoint solutions can be deployed to a resource-limited sandbox or to the entire Web farm. Visual Web Parts, by design, cannot be sandboxed.
SharePoint 2010: What's new for users
SharePoint 2010: What's new for IT pros
SharePoint Workspace: The renamed Groove has gotten groovier
Don't be caught without a SharePoint recovery solution
An early look at SharePoint 2010