New features include:

• an exceptions framework (communicated across the wire - an exception on the remote box raises the same exception locally)
• Box#bash to execute arbitrary bash command (returns stdout, raises an exception with stderr if shell command returned failure)
• FindBy extensions for processes.findby_pid(123) and processes.findallby_cmdline(/mongrelrails/)
• Process#parent and Process#children
• Process#kill doesn't return until the process is really dead (courtesy of the god code)
• Improved tab completion

Read the full announcement for details.