The U.S. Supreme Court has issued revised Rules of Court that take effect February 16, 2010. According to a Court press release, (pdf) among other changes, the rule revisions:

• reduce the number of words permitted for a Reply Brief on the Merits from 7,500 to 6,000;
• clarify what is to be included on the cover of the Joint Appendix and require that counsel of record include an e-mail address on the cover of every document filed;
• require a descriptive index of the appendices and citations to the United States Code whenever available;
• clarify that only an attorney admitted to practice before the Supreme Court is permitted to file an amicus curiae brief and that extensions of time for amicus curiae briefs at the merits stage will not be allowed.