From ISOGG Wiki
Ancestry Labs is the experimental section of 23andMe, where one can find add-on features that may not be fully integrated into the Personal Genome Service. These features may still be in development, require specialized knowledge or be of interest to only a subset of customers. At any time, they may be revised as experimental features or withdrawn. Conversely, they may evolve into supported, integrated products.
As of July 2010, they include: