A copyright battle between the AP and an online news-clipping service is reaching a climax, and the case could have significant implications for fair use. AP sued Meltwater Group last year, arguing the "reputation management" company had a "parasitic business model" that violated copyright. Meltwater is arguing that it is merely a search engine. Last week, the nation's largest newspapers lined up to tell the New York federal judge considering the case that they support the AP.