I have now tried JPromoter, and although I only wanted it to manipulate page titles, it does do that well, and I am impressed. It does require a hacked frontend.php to work properly as far as page titles go, but that is not much drama. When a new version of Joomla comes out, there several hacked files I have to change anyway.

JPromoter, together with Emir Sakic's sef_advanced is all one really needs to make great search engine friendly pages in Joomla. I had been using com_metataggenerator_v.1.0.1 for meta tags (description is still important in my view, but not keywords - but some people still think they are, so why argue?), but Jpromoter will take metataggenerators place.