Most enterprises needn't worry about the "viral" aspect of open-source licenses. Because most enterprises use software for internal purposes, rather than distribute it, they don't trigger the standard open-source requirement to contribute back derivative works. A recent Federal Computer Week article by John Moore does an admirable job of clarifying this.
There are, however, instances in which an enterprise might well trigger the contribution requirement of open-source licensing. If a company sold off a division to another company, complete with the servers running modified open-source software, this would likely trigger a "distribution" and might … Read more