Of course there are more recent discussions of screening than USPSTF. Though the next edition is in in the works, it won’t be complete until 2002.
The link that I gave yesterday for the full text of the 1996 version is from Columbia University. I prefer their interface to the <a href=“http://text.nlm.nih.gov/ftrs/pick?collect=cps&dbName=0&cc=1&t=943199686""> version at the NLM.