Hi itub. I don't write because I know anything about AnnoCPAN, but because I want to say that you are most certainly entitled to have one thing less to worry about in my life. I once had a paying service that was bringing in quite a bit of money that I shut down for the same reason. I think products/services that are web-based bring an extra level of responsibility/stress.

I suggest talking to the maintainers of the other planets in the CPAN solar system and see if any wants to absorb your project. Post a message loud and clear on the site stating that. Give yourself a deadline to know whether or not there will be an adopter, then either do the adoption or do the shut-down. In that case, make sure to leave the code around on GitHub, so some young turk can make use of your stuff when he or she is inspired in the future :-)

Thanks!