Nice plugin. i needed it for intranet use : very clean and usefull

i just modified some code for my need :
Added a special profile :

add_role( 'idea_submitter', 'Idea submitter', array( 'edit_idea','read_idea','publish_ideas' ) );

function add_ideas_caps() {
    // gets the author administrator
    $role = get_role( 'administrator' );

    // This only works, because it accesses the class instance.
    // would allow the administrator to edit others' ideas
    $role->add_cap('publish_ideas');
    $role->add_cap('edit_ideas');
    $role->add_cap('edit_others_ideas');
    $role->add_cap('delete_ideas');
    $role->add_cap('delete_others_ideas');
    $role->add_cap('read_private_ideas');
    $role->add_cap('edit_idea');
    $role->add_cap('delete_idea');
    $role->add_cap('read_idea' );
    $role->add_cap('see_idea_author' );
    $role->add_cap('see_idea_excerpt');
    $role->add_cap('see_adminbar');

    $role2 = get_role('idea_submitter');
    $role2->add_cap('publish_ideas');
    $role2->add_cap('edit_idea');

}
add_action( 'admin_init', 'add_ideas_caps');

and in the register post type :
'capability_type' => 'idea',

I also modified some views because i wanted an anonymous view of ideas for example.
I Added a code for counting votes (see on http:/imathi.eu)