Bluestone Software today updated its Sapphire/Web application server with more speed, reliability and security, the company claims. The 6.0 version offers a "quality of service" feature that can give users priority over others, such as online buyers making purchases having faster response times than those just Web surfing. A new security feature allows IS managers to control users' access to information. Another feature allows administrators to upgrade the application without interrupting service. Price starts at $25,000.