It seems as though RIM is pleased with App Worlds speed and performance adjustements that they made in the beta release just a few days ago. BlackBerry App World version 188.8.131.52 is now showing up as an official release. The biggest changes in the last beta release were to speed and performance. This was a breath of fresh air as we were so used to a slow, lagging App World.
If you're not seeing the update be patient it will come. In the meantime keep checking the official page here.