I am happy to declare that the WiX toolset is now at Development Status: 5 - Production/Stable. I have had a few people urging this upgrade in status for a while so about a week ago Joe and I did the required project maintenance to get the right bits (v2.0.5805.0) posted to the right places on SourceForge. Everything seems to be working so I'm finally comfortable posting publicly on my blog.
The upgrade in status is recognition that the WiX v2.0.5805.0 toolset has been stable and unchanged for over four months and before that had a year of very minor stabilizing bug fixes. Of course, the WiX v3 toolset is still under development where some builds are better than others but we're generally trending towards goodness at the end of the year.
So in summary.
WiX v2 - Production/Stable (v2.0.5805.0)
WiX v3 - Beta (latest v3.0.3815.0 and climbing)