Here is the text of the Court's announcement:
Beginning with the October 2006 Term, the Court will make the transcripts of oral arguments available free to the public on its Web site, www.supremecourtus.gov, on the same day an argument is heard by the Court.Excellent news. Thanks to Howard and SCOTUSBlog for the link.
In the past, the transcripts had been posted on the Web site approximately two weeks after the close of an argument session. Previously, transcripts could be obtained sooner than they were posted on the Court's Web site by making arrangements in advance and purchasing them from the Court's contract reporting service.
In the past, oral arguments had been transcribed off-site from audio recordings. The Court's current contract reporting service, Alderson Reporting Company, will now utilize the services of a court reporter in the Courtroom and high-speed technology to transcribe the oral arguments more quickly.
Transcripts can be located by clicking on the "Oral Arguments" prompt on the home page of the Court's Web site and selecting "Argument Transcripts."
Transcripts will be listed by case name and the date of oral argument. Transcripts are permanently archived beginning with the 2000 Term on the Court's Web site. Transcripts prior to the 2000 Term are maintained in the Court's Library.
Why the preference of audio over transcript? I would think transcript would be have more utility and be more helpful for use in publications and research. Whereas if you want to make use of some statement(s) you have to play the audio and become transcriptionist for a day.
Of course if you are looking for nuance and inflection, audio is the only game in town. Is that it, perhaps?
Yes, that's mostly it -- hearing the Justices' (and advocates') voices can tell you a lot about the dynamics of the argument that you can't get from a transcript.
Hopefully we are heading rapidly to the day where all appellate courts will post oral arguments and briefs online.