Lion: Open in Terminal
Lion added a new feature that allows you to open a new Terminal tab or window using a shortcut or clicking the Services menu.
To enable go to: System Preferences → Keyboard Shortcuts and click on Services. Under Files and Folders are two entries labeled New Terminal at Folder and New Terminal Tab at Folder.
Assign an, optional, shortcut by double-clicking the right column. (How about ⌥⌘T and ⇧⌥⌘T?)