Agreed on West 16th - went last week, and it has good coffee and a nice ambience. Very cool interior. I think it will do a lot to jazz up that little strip of shops opposite Judith Kerr Primary School, which will work for all the businesses there - including Gusto Italiano, which has a lovely little garden and great paninis.
Meanwhile, in Forest Hill: a nice little coffee shop has opened up in the old Internet cafe (!) next to the old Wetherspoons. Galao is at 27 London Rd in Forest Hill.