Corey Williams of ALA's Washington Office led a discussion of what might be next in terms of Google Book Search, now Judget Chin has rejected the amended settlement.
There is some trepidation about pursuing orphan works legislation because it could result in onerous procedures for libraries who seek to digitize such works. Jim Neal, of Columbia University, suggested that libraries continue the work of researching the copyright status of those purportedly orphaned works that have in fact already passed into the public domain because their owners did not fulfill all the various requirements that were law before the passage of the 1976 Act (like renewing the copyright) and digitizing those "new" public domain titles.
This could significantly shrink the number of orphan works. If we also take a somewhat more assertive view of fair use as well we may well be able to do without orphan works legislation.
Corey also promised a forth part of Jonathan Band's "Guide to the Perplexed" but I haven't found a link to that yet. Here is the link to Part 3.