More Gmail Labs goodies. First up is the Message Sneak Peek which when enabled, lets you preview a message without having to open them first. There is either a keyboard shortcut (‘h’) or you can right-click. Strangely enough, this only worked in Firefox for me and not Chrome.
Next is the much desired and anticipated Nested Labels which mimics hierarchical folders in traditional e-mail and file systems. Although already offered in extensions like Better Gmail, many folks wanted it built-in and/or offered directly by Google, as the extensions tended to break from time to time when Gmail was updated.