According to the Napa Register article below, Lucy Gore is keeping the restaurant (at least for now). But Melanie had hinted at that weeks ago.
Echoing all previous glowing comments on this board, may I say if you haven't been there yet, go. I've lived in Napa for 7 years and finally made it there for the first time last month for a delightful patio lunch with a neighbor. The food was simple, delicious, devoid of frou-frou and fussiness. Make and excuse to get up to the Napa Valley to see Wine Country's attempt at Fall colour and get to Cafe Lucy for lunch soon!