In the Hotel: http://www.doubletreeberkeleymarina.com/dining/
Near the Hotel (Cheap taxi, or see Google maps for walking directions)
*****Vik's Chaat: http://www.vikschaatcorner.com/
Awesome Indian chaat counter in a warehouse. Not to be missed. 1.4 miles away from the hotel. Well worth missing a conference lunch for.
***/*Also, 1 mile away: https://www.google.com/#q=restaurants+on+4th+street+in+berkeley
In Downtown Berkeley
(by taxi or bus http://www.actransit.org/maps/schedule_results.php?ms_view_type=1&version_id=21&maps_category=2&maps_line=51B&map_submit=Get+Schedule )
You must try a few of these. Coordinates are on a North-South axis with the origin at Downtown Berkeley BART. All are on Shattuck Ave, except for Gather.
****Comal: Awesome nouveau Mexican, $$$ 200 ft N, on the left.
**Jupiter: Fun brewery and dinner $$, across the street from BART.
****Gather: Fun, loud, veggie and vegan options, $$$ 800 ft SE. Across the street: **Saturn veggie diner, $.
*****Chez Panisse Cafe': For some of us, the definition of good food, $$$. Keep this a secret: You can walk in after 10pm. 0.7 mi N, on the right.
*****Chez Panisse: Probably too late to make a reservation, $$$$. 0.7 mi N, on the right.
***Trattoria di Corso: Fine reasonably authentic Italian, $$$. 0.4 mi N, on the left.
**Cafe (Gr)atitude: Vegan. A fun, strange, and easily avoidable Berkeley experience, $$. 0.5 mi N on the left.
****Cha Ya: Japanese vegan, $$ 0.6 mi N, on the left.
***Cha Am Thai: Excellent sea food, $$. 0.7 mi N, on the right.
**Liaison: Solid basic French, $$. 0.3 mi N on the right.
****Cesar: Barcelona tapas, drinks $$, .7 mi N on the right.
For restaurants see also Satish's list http://www.cs.berkeley.edu/~satishr/restaurants.html and the other links therein. (Ignore the first paragraph, that was another conference.)
The world famous Berkeley coffee shops: http://projectamericano.com/berkeley.html, plus the new Blue Door Cafe on Bancroft.
Michael Chabon on the mysteries of Berkeley (because it would be a pity to come so close and not know…): http://are.berkeley.edu/~howardrr/berkeley.html