A major missing feature from the Big search engines is that they don’t bother understanding the richer microformats2 content on many IndieWeb enabled sites. Data like “this a like of that post” and “this is a reply to some other post”.
Ryan Barrett did some great exploratory work last year on a microformats2-enabled crawler and on the resulting data set: http://indiemap.org/
Marty, thanks. There appears to be a lot of neat things going on, which is great.