Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Jessica Alba speaks at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Salman Khan speaks at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Dave Morin speaks at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Newary, NJ Mayor Cory Booker laughs onstage at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Jack Dorsey waits backstage at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: John Zimmer smiles onstage at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Reid Hoffman speaks at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Jack Dorsey speaks at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Brian Lee (L) and Jessica Alba laugh at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Jack Dorsey poses at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Jack Dorsey speaks at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

SAN FRANCISCO, CA - SEPTEMBER 10: Jessica Alba (C) and Brian Lee (R) wait backstage at TechCrunch Disrupt SF 2012 on September 10, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)

Tech:Crunch Disrupt SF 2012

(credit: James Martin/CNET | Caption by: James Martin)

Today was the start of TechCrunch's innovation and start-up conference, Disrupt 2012 in SF, which featured a cast of Silicon Valley entrepreneurs, venture capitalists and start-ups speaking on the best practices for navigating the often crowded world of tech company incubation.

Tech:Crunch Disrupt SF 2012

Jessica Alba (credit: James Martin/CNET | Caption by: James Martin)

Celebrity actress turned turbo mommy Jessica Alba told the tech crowd all about baby wipes.