Forrester's Enterprise And SMB Software Survey, North America And Europe, Q4 2008 makes it clear that open source software (OSS) is a top priority for software development professionals in 2009. Adoption rates vary by region and company size, but a consistent increase in interest points to a second wave of OSS adoption, this time led by mainstream development organizations. Software development professionals at firms that are already using OSS should beware uncontrolled tactical use and develop sound OSS adoption policies. Those at shops that have not yet adopted OSS should leverage the current economic climate to force a discussion about the benefits of its strategic use.