Williamsburg's The Jardin made the rental switch in February, refunding all of the buyers' deposits in the process. The decision turned out to be good one, as the 44-unit building was fully leased up within five weeks of appearing on the market. Currently, there is only one unit, a 2BR, available for rent.

After failing to sell many condos 75 Clinton Street in Brooklyn Heights (once described by Brooklyn Heights Blog as "gruesomely unattractive") changed ownership and decided to go rental in January. Currently, all of the units appear to be rented, even the $11,000/month penthouse.

After its developers ran out of money in 2009, construction on The Williams stalled. It was brought back from the dead by Lucky Boy Development, who decided to turn it into rentals. Currently, none of the units are available on Streeteasy.

Fort Greene's Fino175 gave up on actually selling condos in April, deciding instead to rent the units out for between $2,800 and $6,000/month. It appears to have worked, as there are no units currently available.

Karl Fischer's 100 Luquer Street in Carroll Gardens would still just like for somebody to buy the whole building please for $16.3 million. But in the meantime, it's happy to rent out units for between $3,500 and $5,500/month. That's not working out so great either; despite making the switch in May, 11 units remain on the rental market.

The long-dormant, 14-unit, Robert Scarano-designed condo building went rental in May, and seems to have done well for itself. There are no active listings to be found.

Two months after the rental switch was rumored, 16 units in 88 South 1st Street are available on aptandlofts.com, for prices ranging from $2,550 to $5,250/month. UPDATE: The marketing team reminds us that buyers' deposits were returned at this building, too.