At the request of many, the call-for-papers deadline for Hadoop Summit has been extended by two weeks to March 7th.
Also, please note that you only need to submit an abstract at this time. You will have much more time to create your actual presentations.
Additional details are here: www.hadoopsummit.org, including a description of the various tracks.
Looking forward to seeing everyone at Hadoop Summit on June 13th and 14th in San Jose.
The Hadoop Summit team