I've had reason to consult the printed edition of SBL Seminar Papers in the past, though I wasn't aware that the printing of the papers had been discontinued.

The SBL web site does make available seminar papers from 2002-2006. I was unaware of this until I stumbled across the page while looking to see if any version of the program guide for San Diego had been released yet. Here's the description paragraph from the page:

In years past, a print edition of the SBL Seminar Papers was made available in advance of the Annual Meeting each year in order to stimulate discussion of these works in progress during the meeting itself. Beginning in 2004, however, the print edition was discontinued, with a selection of papers presented at the meeting being made available online. In addition, a number of papers from previous years have been archived on the SBL Web site. Because these papers represent works in progress, they should not be quoted or otherwise cited without permission from the author.

(No, there is no release of a program guide yet. But console yourself with some of last year's seminar papers if you'd like.)

(NB: Actually, the archive goes back to 2002, though I have not changed the post title as it would change the link, and I don't want to do that.)