Of the 16 social and media technologies making their debut at the Demo conference in Silicon Valley, Bump.com was perhaps the most intriguing and original idea.

It’s social networking through your US number plate, or license plate as it’s called here – with possibilities for dating, car talk, safety messages and receiving offers all wrapped up in your bumper. Read more

Demo, a kind of Britain/America’s Got Talent for technology startups, is celebrating its 20th anniversary with its first conference in Silicon Valley.

The 66 companies showing their wares here are restricted to six minutes to make their pitches to an audience of VCs and media, with those only at the  “alpha” stage of development limited to just 90 seconds.

It can be hard to pick out the winners from the crowd, but my “judges notes” from the Wednesday morning session featuring 17 consumer technologies are after the jump. Read more