D7: All Things Digital Conference opens with the Twitter team

6:37 p.m. PT: Rupert Murdoch takes the stage to kick things off.

6:40 p.m. PT: Singer Jill Sobule takes the stage with a song written for Rupert. Kara Swisher comes out to hold the lyrics.

"Rupert I met you last year at this conference," she sang. "Do you remember me. They took our picture. you gave me a warm hug. It was really disconcerting. I've never been a big fan."

6:47 p.m. PT: Walt Mossberg and Kara Swisher take the stage.

7:10 p.m. PT: Back up after some networking problems. To make a a long story short, Swisher and Mossberg have been hammering them on how many people regularly use Twitter as well as about their past company, which specialized in podcasting and got "crushed" by Apple, according to Mossberg and Swisher.

"Crushed, I don't know," Twitter co-founder Evan Williams said. "We took a different route."

7:13 p.m. PT: Another thing that was noted while my computer was misbehaving, Twitter has just 43 full-time workers. And even that is a big jump, Biz Stone noted.

"We've doubled since January," Williams said.

7:25 p.m. PT: Swisher asks them what it is like to be the hot company.

"That is not going to last," Stone said. "Pretty soon everyone is going to hate us...maybe by the time we are done speaking. The worst thing we could do is get all caught up in this."