Since November 2004, appellate briefs in cases set for argument have been made available for free as scanned PDF files on the Court's web site. As of May 12, 2005, those appellate briefs are now available on Westlaw for those who subscribe to the Litigator package. The database is WV-SCT-BRF. There's a guide available. In addition to the full text of the brief, West adds a Table of Authorities with KeyCite information for the cases cited, and hyperlinks to all cases cited. I checked this afternoon, and the service is up-to-date, containing briefs in cases argued as recently as Wednesday of this week.