The submission server is up, and can be found via the conference web site. Here is the note from the conference chairs:
Dear Computational Geometers,If I may be permitted a brief snark, I hope people will submit not-so-recent work as well :).
The Web site for submissions to the ACM Symposium on Computational Geometry is now up, and can be accessed through the conference Web site at http://www.cs.arizona.edu/~socg06/.
This year we want people to submit an abstract by Nov 23, before the paper deadline of Dec 5. We will use these abstracts to assign papers to committee members, so that the committee members will have more time to read the papers. Please be aware that if you do NOT submit an abstract by Nov 23, there will be some delay in getting you paper to the committee.
Looking foward to seeing your recent work!