I have a clean install of Xampp (PHP 5.2.9, MySQL 5.1.33-community) and a clean install of MediaWiki 1.14. On the Special:Version page, after installing Semantic MediaWiki 1.4.2, it's listed under Parser Hooks, but the only function listed under Extension Funxtions is smwfSetupExtension.
According to Semantic MediaWiki INSTALL file, I should have "several wfSMWXxxx functions listed as Extension Functions."
I believe I've configured the extension properly, adding the required lines to the bottom of LocalSettings.php.  Also, all of the tables, for both MW and SMW appear to have been created in the DB.
I've tried this on a couple different machine with the same result.  Does anyone have a clue what I'm missing?