We are two days into Disrupt SF, and 31 startups have battled in front of the judges and an audience of thousands to vie for the Disrupt Cup and $50,000. The caliber of the startups across the board was so strong that seven of them are advancing to the final round.

After tallying up the independent judges’ scores and conferring with the TechCrunch writing staff, Heather Harde and I have selected the following Battlefield companies to present on Wednesday at 3:30 PM PT.

(In the spirit of disclosure, two of the companies, Bitcasa and Prism Skylabs, are CrunchFund investments, but we didn’t hold that against them. Along with the other finalists, the judges scored them the highest. The CrunchFund is Michael Arrington’s new venture fund. He was not involved in the final selection of these companies).

You can watch their first-day demos below. They are (in alphabetical order):

1. Bitcasa (post)
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2. Cake Health (post)
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3. Farmigo (post)
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4. Prism Skylabs (post)
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5. Shaker (post)
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6. TalkTo (post)
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7. Trello (post)
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