Boat-shaped museum plan floated -- zing! Today a plan for a Boston Museum was unveiled, to be planted (literally) in the earth along the future Rose Kennedy Greenway, above the underground Central Artery Tunnel. Architect Moshe Safdie -- who apparently works in Somerville, yeah! -- is also the designer of the Yad Vashem Holocaust Memorial in Israel, and the new wing of the Peabody Essex Museum in Salem. I've been skeptical in the past about the feasibility of keeping the Greenway a public space, but this seems to be a real possibility. Now all they need is $89 million more dollars...