San Antonio-based Payment Data Systems says its Bills.com subsidiary has more than doubled its subscriber base over the past year with revenues growing at double-digit rates. Bill.com is currently providing a new version of its consumer online bill presentment and payment service. The service enables consumers to pay anyone possessing an email address transfer money between multiple accounts, view and pay eBills, and receive eBill summaries in their email. Consumers can now track, manage, and archive their bills, payments, and accounts. Bills.com, a wholly owned subsidiary of Payment Data Systems, Inc., provides a convenient source of online bill payment. Payment Data Systems delivers cost-effective solutions to billers and retailers who process and manage electronic payments using the Internet, point-of-sale, customer service representatives, or an Interactive Voice Response.