Whatever you had under Jaguar was not stock.
IIRC, Apple added a "Move File here" to the Finder/contextual menu in Lion 10.7.
It is invoked by Cmd-opt-V, or by holding the option key in the context menu ("Paste" should turn into "move file here").
Under 10.6, File Cutter and Move Addict appear to be working third-party tools to do what you want, but I cannot vouch for either.