The ACLU has plenty to say, along with a lot of other parties. Here is the brief on behalf of the ACLU and several other organizations The ACLU is on the right side of this case.
http://www.scotusblog.com/wp/wp-content/uploads/2009/04/nacdl-et-al-4-14-09.pdf
Links to other briefs can be found here:
http://www.scotusblog.com/wp/?s=Jackson
Thanks for the links.
Here is a quote from the link:
“The Jackson rule ensures that the right to assistance of counsel does not become a meaningless abstraction, easily lost when police confront the defendant outside the presence of counsel. Amici strongly support the Jackson rule for all persons. In this brief, however, amici present empirical evidence that the concerns undergirding the Jackson rule are magnified for particularly vulnerable defendants, including the mentally and developmentally disabled, juveniles, those lacking education, those with substance addiction, and the indigent. These defendants are especially vulnerable to police suggestion that counsel is unnecessary, many such defendants lack the capacity to appreciate the importance of counsel, and many exhibit characteristics that make them prone to give false confessions. If Jackson were overruled, incidents of false confessions would likely increase. And, while serious harm would be done to our criminal justice system as a whole, the most severe and tragic consequences would befall the most vulnerable defendants.”