I have been researching Drupal Commerce to see if it can be used for marketplace functionality.

It looks like there was a demo of this functionality in Denver of March this year.

Is there any video/documentation on this presentation?

I also found this on Drupal

Our use case is as follows.
1) Multiple sellers list products.
2) Payment from buyer is processed to central (admin) account.
3) Seller marked items as shipped with tracking number.

Is this currently possible in Drupal Commerce?