I thought I would start this thread to capture resources needed for the ADS-B mandate:
Interactive site that shows the ADS-B coverage by type: https://www.faa.gov/nextgen/programs/adsb/ICM/
Link to an interactive Google Earth site that allows you to search for airports to show whether ADS-B out is required (also helped validate why active traffic is not such a bad thing - check out the video): https://www.faa.gov/nextgen/equipadsb/airspace/
The flight test requirements (section 4.3): https://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_20-165B.pdf
The FAA's rebate program website: https://www.faa.gov/nextgen/equipadsb/rebate/
Hope this helps.