Cloud Computing 2010
Razorfish Technology Summit
Robert Scoble, Rackspace
Feed Streams
Social Profiles
Location Based Services
Collaborative Services
Augmented Reality
Social Games
Business Data
Twitter
Facebook
Google (soon to come)

Redux http://redux.com
Seesmic http://seesmic.com/web/index.html?locale=en
Skygrid http://skygrid.com
Gnip
Hootsuite
CoTweet
Google Profiles http://www.google.com/profiles
Blippy
Plancast
Foursquare http://foursquare.com/
Gowalla http://gowalla.com
MyTown http://www.booyah.com/
Yelp http://yelp.com
SimpleGeo
Zoho http://zoho.com
Google Wave https://wave.google.com/wave/
Salesforce Chatter http://www.salesforce.com/chatter/
Yammer http://yammer.com
ViVu videoconferencing http://vivu.com
Jive
SocialText
Atlassian
Metaio http://www.metaio.com/
Layar
FathomDB http://fathomdb.com
Box.net http://box.net 
Kynetx http://kynetx.com 
Gist
Zynga http://zynga.com
Tapulous http://tapulous.com 
Video
Justin.tv http://justin.tv
Ustream.tv http://ustream.tv
Boxee
Clicker
Altus http://altus.com
In app payments
Payvment
PayPal
Crowdsourcing
CitySourced
Waze
Aardvark
Infrastructure management
Cloudkick https://www.cloudkick.com/
Nimsoft
Mashery http://www.mashery.com/