An updated version of the VIM plugin has been released. This latest version now fully supports VIM style searching via / and ? and full support for the :s[ubstitute] command and it's variants and cousins. Full VIM regular expression syntax is supported.
Several :set options are now supported (mostly search related).
Your $HOME/.vimrc is read on startup and the supported :set options are setup accordingly.
Check out the lastest version at SourceForge - http://sourceforge.net/projects/ideavim/
See http://ideavim.sourceforge.net/vim/index.txt for a complete list of supported commands.