There is an elegant way to get out of that. Approach your management (usually requires director-level approval), and say that you are doing some volunteer web

There is an elegant way to get out of that. Approach your management (usually requires director-level approval), and say that you are doing some volunteer web site work for [insert charity] on the weekends, and they require a signed release that your employer OK's it. This can also fall under the "requires approval for moonlighting" clause in many employee handbooks. Then, assign all copyright to your opensource work to the FSF, which is a 501c organization.