With Joomla 1.7 the user community placed a large emphasis on making the CMS installation process as simple as possible and new versions more frequent.
This will allow users to more easily and frequently migrate to the latest version of Joomla, and take advantage of all the security benefits associated with running the newest code. We think Joomla users around the world will really embrace this new process.
Six-Month Release Cycle
A shorter development cycle that will enhance Joomla’s stability by providing more core feature development and adoption. Short-term releases will be in active development for six months, then reach the end-of-life one month after the next version’s release. Long-term support will be active for 15 months, starting with Joomla version 1.8. Version 1.7 will have a support cycle of seven months.