Yes Q2A 1.8 beta is ready for testing! I'm waiting for Gideon to update the site with the official download but people can download it from the dev branch on GitHub if they like.
Would be great if we can get as many people as possible testing the upgrade on their (localhost) sites, especially if you have a custom theme. Some of the <form> tags have been moved around slightly so there may be a few things you need to update. Specifically, if your theme overrides the following functions, you should check your overrides against qa-theme-base.php: