A few breweries have opened up since about 2010. There aren't any reports here for two new additions, Cellarmaker and Cerveceria de MateVeza.
Cellarmaker Brewing http://www.cellarmakerbrewing.com/
Cerveceria de MateVeza http://cerveceriasf.com/
Social Kitchen and Brewery http://socialkitchenandbrewery.com/
Southern Pacific http://sfbrewersguild.org/breweries/s... see http://chowhound.chow.com/topics/831166
Southpaw BBQ http://www.southpawbbqsf.com/ see http://chowhound.chow.com/topics/767580
I'd love to see these young breweries develop and get competitive with older and/or non-local breweries, but do any currently make beer worth trekking to? User bbulkow took several for the team on his epic walk last year ( http://chowhound.chow.com/topics/874510 ) and only advocated for the one beer Southpaw makes on premises.
I went to Cellarmaker over the weekend. A few of us found their petit sour disappointing, but I really liked the samples I had of their porter and stouts. Do others find them or other places promising?