I think I've got things working and seem to be receiving webmentions to my home page now. Though for some reason the original test from twitter I did didn't manage to come through (https://twitter.com/ChrisAldrich/status/843937394353041408). I'll watch it for a few days and do some additional testing to make sure it's working as well as it seemed in v2.4.x.

Having the ability to direct "stray" webmentions to a particular post/page (like http://boffosocko.com/mentions/) is a nice feature.... many probably don't necessarily want them to accumulate on one's homepage.