Make Indent/Outdent buttons gray out when not applicable

My quick fix:

Add the following to postInit:

$j(wym._doc).bind("keyup", {wym: wym}, toggleIndent);
$j(wym._doc).bind("click", {wym: wym}, toggleIndent);

And in $j(function() {}):

function toggleIndent(event) {
    
    var wym = event.data.wym;
    var container = wym.container();
    if(container && container.tagName.toLowerCase() == WYM_LI) {
        $j(wym._options.toolsSelector).find('.wym_tools_indent').show();
        $j(wym._options.toolsSelector).find('.wym_tools_outdent').show();
    } else {
        $j(wym._options.toolsSelector).find('.wym_tools_indent').hide();
        $j(wym._options.toolsSelector).find('.wym_tools_outdent').hide();
    }
};

A better solution than show/hide would be to update the images, but it requires a little bit more work.
Could be implemented as a plugin, if you have some time.

Perhaps the SAPI (planned for 0.5) will help.