Proxi is a free Mac OS X utility from Griffin Technology that allows users to assign automated events (called "tasks") to triggers such as hotkeys, email, iTunes, RSS feeds, and Griffin hardware (PowerMate, AirClick, radio SHARK). These tasks can display messages, play sounds, write to files, execute AppleScripts, and control iTunes and iChat.
Specify where (position) and what size you want newly opened Finder windows to appear.
