Maybe:
Yes: Good opportunity to learn more about IndieWeb and clean up my web presence
Yes:
Maybe: Hoping to attend. My blog is a bit of a mess and I'm in the process of cleaning it up.
Yes: This should be interesting. I recently started using Hypothesis and love the idea of being able to take notes or annotate on individual sites. I remember Opera had something like this built into it many years ago but it was buggy and only worked with Opera.