There are extra issues related to running many related lists. In particular, you may need to make a regular post to all your lists explaining what lists exist and what they're for. This helps keep things on topic on all the lists.
Your list-of-lists should contain the list names, subscription details, main focus, and an example of the sort of thing posted there. I'd recommend posting it fortnightly or monthly, depending on how busy your lists are and how badly they need it.
Example 5-2. List of lists
Here is the monthly reminder about the foonix mailing lists. foonix-dev Subscription address: email@example.com Topic: Developers of foonix Example: "Should we include this in the next release?" foonix-announce Subscription address: firstname.lastname@example.org Topic: Announcements about foonix Example: "Version 3 is available for download via FTP" foonix-support Subscription address: email@example.com Topic: Questions and support requests Example: "I can't get foonix to install"