CALABASAS, Calif. – Digital Insight Corp. says it has extended through 2007 its marketing agreement with online help specialist LivePerson Inc. ( The New York-based company’s Timpani platform combines live chat, email management and a self-service knowledge base to manage online sales and support. Digital Insight says the agreement will allow its more than 1,100 online banking clients – including more than 700 credit unions – to “now receive superior terms for LivePerson products and solutions.”