Content management software maker Interwoven has acquired interactive marketing services firm Optimost for $52 million in cash. The merger is intended to provide both with a way to create, deliver and analyze targeted online content. On its own, San Jose-based Interwoven has helped service websites for Adidas, Airbus, the Federal Reserve Bank, FedEx, HSBC, LexisNexis, Microsoft (NSDQ: MSFT) and others. Meanwhile, New York-based Optimost has specialized in “landing page optimization,” matching keywords to likely potential users’ search queries, and has worked with AOL, Ask.com and Auto Trader. The purchase is expected to close this year. Release