Many people have been waiting for several extensions to catch up to Joomla 1.6 and Joomla 1.7 before building sites in these Joomla versions. In general, most extensions that worked in Joomla 1.6 are also working in Joomla 1.7. However, several popular extensions developers have not yet released their products as 1.6 or 1.7 compatible. Here’s status on several.