What is the Craft Brewers Conference?

The Craft Brewers Conference (CBC) is the only industry event that serves both brewpubs and packaging breweries.

For professional brewers, CBC is the number one environment in North America for concentrated, affordable brewing education and idea sharing to improve brewery quality and performance. The conference is also a great social event with over 2,600 brewing industry professionals enjoying craft brews together. BrewExpo America allows exhibitors and buyers to develop profitable business relationships and helps brewing and brewery restaurant professionals encounter the latest and best products and services that industry vendors have to offer.

Anyone have a recommendation where I should be sure to see as for breweries down in San Diego?  I know I am going to see a few but what is that must not miss brewery/pub?