This morning Mayor Bloomberg and Brooklyn Borough President Marty Markowitz held court at McCarren Park Pool for a groundbreaking ceremony. Over the past few years the pool has come back to life with JellyNYC's concerts (now still in search of a new home with help from Senator Schumer) — but soon it will return to being a community pool, thanks to Bloomberg's $50 million PlaNYC renovation. Today he promised he'd be the first to take a dip when the project is done, but so did Marty. Who will make the first splash?! We'll have to wait til 2011 to find out...