This component may make Joomla reach Search Engine Optimization nirvana. I have always been frustrated with the tired joomla page titles. It has been a real weak point for Joomla but the Joomlatwork guys seem to have turned it around in a big way.
In addition controlling meta tags, google cache, etcetera the Joomla SEF Patch extended version lets you take full control of your page titles which are so critical in SEO. The component allows you to control page titles through a tag system.
[TITLE] - [SITENAME]
or
[TITLE] - [CATEGORY] - [SECTION]
or
enter any page title on a per page basis using Title Alias field in the content editor.
This is a very nice and very needed component. There is one downside to the component that I know of. It actually stems from the fact that this component relies on the free joomla sef patch which changes the core files including the main index.php file in the joomla root directory. If you use JoomlaHacks SMF Bridge you will not be able to patch your joomla files with the patch. I have reported this to the JoomlatWorkguys and they say the are addressing this issue. So far they have been very quick to respond to make the component better and address the needs of users.