This is certainly much better than just letting the software die a silent, anonymous death. At work we were about to do a project localized to a language nobody at the office speaks, so we were looking forward to using CopyCopter to work with the translators. I'm very glad Thoughtbot had the decency to release the code, so that we still have the option to use it.

I do hope, however, that the developers there continue to play a role in the project. Just "dumping" a product into the open source world without continuing to contribute to it can kill a product almost as effectively as shuttering it with no source release.