Remember that the submission deadline is Tuesday, April 30. Get those proposals in now!
If you are submitting a paper, it can be the full (draft) paper or it can be an extended abstract, 4-8 pages in length.
See the CFP page for more details.
Speaking of which... I have not yet submitted a proposal for an Invited Talk. What would you like to hear me talk about? Invited talks are usually 90 minutes (or 45 minutes for a half-session). What would you like to hear me talk about? (Post a comment)