Korean tabletop-grill restaurant Ginseng aka The Grill Story (475 Castro) became K-Pot Grill (similar format) www.kpotgrill.com .
Peet’s Coffee inaugurated its new downtown 420-Castro location in August.
216 Castro’s Quality Bourbons & Barbecue opened as promised in September, with award-winning barbecue chef and many Bourbon whiskeys.
Drunken Lobster departed 212 Castro after two years, although its pizza slices and other non-seafood items remain available from the new business there, Maison Alyzee, until remodeling starts. Owner Laurent Pellet told me he plans to open a new French bakery on the site in January.
After four years in business, Indian eatery Park Balluchi, 288 Castro, “re-branded” itself Mantra India, and promises menu updates early in the new year.
Yami Grill (http://www.yamigrill.com), in the site of the former Yam Leaf Bistro, 699 Calderon at Church, opened in October.
Biryani specialist Biryaniz, part of a small northern-California restaurant group, replaced Shalimar Sizzle at 246 Castro in October (I had a good inexpensive biryani meal there: https://nextdoor.com/news_feed/?post=68896415 ).
At 124 Castro, East Street Tacos/Tapas closed. Chop & Pub, “focused on booze and small plates,” has soft-opened: https://www.mv-voice.com/blogs/p/2017/10/09/chop–pub-to-open-in-mountain-view
Posh Bagel, 444 Castro, will close soon for a major remodeling lasting months.
Venerable Japanese restaurant Yakko (975 W Dana) changes hands in November, the old owners expressing confidence that the quality will continue.
Instant-ice-cream chain deli Icicles, originally announced for 282 Castro, is under construction at 292 Castro replacing a tentatively planned Pushcart Creamery there. (Neighbor Katarina Ling reported a Coming Soon display for C’est Si Bon appearing a few days ago at the 282 address.) More about Icicles, from Elena K at the Voice/Weekly:
https://www.mv-voice.com/blogs/p/2017/06/26/rolled-ice-cream-coming-to-mountain-view
[Edited To Add:] C’est Si Bon info: https://www.mv-voice.com/blogs/p/2017/11/08/san-jose-bakery-expanding-to-mountain-view
Popular Middle-Eastern grocer, delicatessen, grill, and caterer Rose International Market (a local institution until displaced to Cupertino by the Greystar apartments project at its ECR/Castro corner) advertised plans to return in December. http://www.rosemarketcatering.com/