We are currently working on several related things.
BuildBot/Master already build all revisions and list/log the status/success in several ways (html, irc bot msg, etc.), and there are investigations ongoing to add scripts to test the builds in a virtual machine (setup, regression testing test apps, etc.). Plus there will be two start pages on the website, one for the community and one for development around ReactOS. Both pages will present the latest activity which is interesting for each group of people.
community: forum, wiki, compatibility and svn commit activity development: svn commits, buildbot, bugzilla and translations (ros itself and website)
So, if you want to test ReactOS trunk, just visit the community (or dev) page and copy&paste the latest known good revision to your svn client.
If you have any suggestions/ideas, just mention them here.