Easily manage "dead" blogs in your multisite install.
Provides a new section in the superadmin area under 'Sites' called 'Dead'.
Lists blogs, just like 'All Sites', but provides filters specific to finding dead blogs. You can filter by:
Also offers a bulk email feature where you can email all admins of a set of blogs with some codes for personalization.
Note that you might need to be using a modern browser in order for all features to work.