If you look at Fred's UVC portfolio for "Consumer Web" I would hazard that their three largest are Twitter, Tumblr, & FourSquare.
Each of these companies is currently making massive pushes to "monetize" their consumer web bases:
For example: FourSquare is only @ $2m/yr & hires first VP of Revenue (1), Tumblr hires new head of global ad sales & Fred Wilson defends rev model (2), Twitter infuriates developers, pushes new ad units (3)
That story is playing out all over the consumer web right now, including at Facebook.
Pulling from a GigaOM article "Wilson thinks sites should follow Twitter’s lead and ensure ad content is the form of an atomic unit that mimics the native content – a tweet on Twitter, a video on YouTube and so on."
Each of the portfolio companies he's involved in are embracing that model.
But as an observer it seems that while the inclusion of "atomic" ad units is certainly a good solution, they're not going to fetch anywhere close to the price of Google's search inventory - eg the Holy Grail of monetization - so there's got to be less excitement as VCs watch these #s unfold.
(1) http://www.businessinsider.com/foursquares-revenues-valuatio...
(2) http://gigaom.com/2012/11/07/is-tumblr-the-new-geocities-vc-...
(3) http://www.telegraph.co.uk/technology/twitter/9481987/Twitte...