RCN has successfully tested 20 Mbps high-speed data service over its cable networks in the Washington, D.C. and Boston markets. Some highlights from the company's quarterly financial report:Third quarter 2005 revenue of $138.8 million decreased 1.4% from $140.7 million in the third quarter of 2004 and 1.8% from $141.4 million in the second quarter of 2005.Third quarter 2005 ending subscribers were approximately 411,000 versus approximately 429,000 in the third quarter of 2004 and approximately 413,000 in the second quarter of 2005.Third quarter...