Boonex just released Dolphin 7.0.4 final - stable which you can read more about in this Unity Blog Post:
Dolphin 7.0.4 (anti-spam)
Some of what is new:
If you have a modded Dolphin 7 web site you probably will want to check with your modder or developer before upgrading. Do some research to make sure any alterations you have made will still work, and if you can or will need to reapply them.
Check the above link for any problems. Also, visit the Unity Forums to see if others have had any problems or issues in regards to upgrading.
Always make both a site backup (files, folders, etc.) and a database backup before proceeding with an upgrade.
Allow yourself plenty of time to understand and complete it.
Review the Dolphin 7.0.4 upgrade instructions and understand them before hand.