Yesterday was a gorgeous day to kick off the 2009's season of Summer Streets, the three-Saturday event that closes down a 6.9 mile stretch of roads—along Park Avenue and other connecting streets from the Brooklyn Bridge to Central Park—to vehicular traffic. As part of the 400th anniversary of Henry Hudson's exploration of the New York, the Dutch consulate's NY400 celebration has 150 orange bikes that bicyclists can rent for free—there's even a photo competition for people to enter and win one of the bikes (details here).