Fu Lam Mum/Moon formerly at 240 something Castro street (now new tenant is a Vietnamese restaurant called Minh's) is re-opening at 155 Castro street next to another business venture of the owner's known as Hong Kong Bistro.
The new 2 story building is done but the insides are still being worked out. Two full stories, a full alcohol bar, and will offer dim sum according to when I last spoke to a friend of the owner who works at HKB.
Best guess is April/May timeframe for opening, and will be the only option for dim sum in Mountain View, since Golden Wok is stuck in "remodeling" mode with no news or update (the place is empty, not sure what they are waiting for).
On another note, it looks like Middlefield Road's famous Taqueria La Bamba has opened a branch right across from the new FLM. Xanh restaurant has moved down the street and across from its old location.