Here is a useful article for any software company considering using open source components in your applications. I can tell you from personal experience that if you think getting acquired is part of your exit strategy then you need to pay attention to what open source code may find its way into yours, because your acquirer certainly will. If you’re not planning on getting acquired, its still a good idea to understand what your legal exposures might be.

My suggestion is to make sure you document any third party (even commercial) code and how you’re using it across your applications; and then have an attorney review the appropriate license agreements.