A tipster wonders what's going on at the corner of Keap and Ainslie streets in Brooklyn, where this curvy tower is rising. Back in 2007, a company called Sun Sun purchased the 467 Keap Street lot and registered it under the name Ainslie Tower LLC. The Department of Buildings didn't seem to get the tower memo at first, because it denied an application for a 10-story residential building on the spot. But there's now a permit out for what appears to be the same project, a 29-unit residential building. The architect is Gilman Architects, the team behind LIC's well-lit Murano, Harlem's upcoming Glass Spire, and a pair of dancing buildings that look like they may be the inspiration for what's happening on Keap Street.