From our evolving ZLab3d FAQ as of late July 2014:
While you can cure B9Creator prints by sunlight, it’s faster to use a UV curing chamber, such as a fingernail polish curing unit, or your own design of a ventilated box with UV lights. Some also use a small turntable inside to rotate the prints for all-round UV exposure.
If you plan a lot of printing, consider extra vats and build tables, built yourself or from ZLab3d. Each PDMS layer is slightly different height, so must be calibrated, a brief process, to the build table. So pairing vats and build tables might be worth doing depending on your situation.