I developed InstaCalc while the YouTube acquisition was happening. It was a great chance to try out a key scenario where numbers need to be shared:

• Fred Wilson blogs about YouTube's potential revenue. He invites readers to play with his assumptions.
• I left a comment with an InstaCalc calculation containing his results, allowing others to link to or edit his analysis.
• A French blogger changes the assumptions for his own calculation.
• Paul Kedrosky writes an article about YouTube takeaways, showing readers where they can play with a nice online calculator.
• Gagglescape links to the InstaCalc calculation, allowing readers to see the details of the financial analysis.

The goal of InstaCalc is to make calculations easy: creating, editing and sharing without a hassle. I'm really happy that people found the site useful and easy to link to, and the ongoing feedback helped me create an embeddable version, here:

Now you can see one model of the YouTube valuation. Do you agree with the numbers?