It's over. There's no more MCM program or certification from Microsoft. The last MCM test was given last year and no upgrades are planned for SQL Server 2012 or SQL Server 2014. That's a little sad, though there are quite a few of our SQL Server professionals that can still proudly wear the MCM title for the rest of their careers.
The MCM tests were designed differently than all the other MCP type tests, requiring more thought and deduction, as well as practical skills. The lab in particular was daunting to many of the MCMs, most of whom would tell you about the difficulties in getting through the scenarios in the limited time alloted. All of the people I've talked to found the challenge refreshing and also informative, enabling them to learn a few things about their knowledge, even from the problems they didn't complete.
Since that chapter in Microsoft Learning is complete, and the tasks likely out of date, I'd ask that Microsoft Learning release the questions and scenarios to the world as an open source project. Unlike the other certifications and exams, these questions aren't going to be re-used anytime soon and the knowledge could help many people learn to build better solutions.
This would be a great move, allowing many DBAs to challenge themselves with the questions and scenarios in practice labs. The types of scenarios could be used in interviews for new employees, either as they are written or modified for a particular environment. Professionals using the SQL Server platform would get an idea of not only the broad level of knowledge that MCMs have, but they'd also have a way to test themselves and direct their own learning to become better rounded SQL Server developers and administrators.
I doubt it would happen, but I'd think Microsoft could help the community, generate some goodwill, and help improve the overall quality of people working on their platform.
Update: I have opened a Connect item for this. Please vote.