Hey, thanks for linking hndigest! We're in the process of rebuilding hndigest from scratch. If you'd like to sign up now, I suggest using the beta version which has improved looks and robustness (and upcoming new features):
https://beta.hndigest.com
(If you're an old subscriber, you'll be moved to the new version in the upcoming days/weeks. Don't fret, if you don't like the look of the new version you can still select the old-style look).
Matching keywords in title/url/text or url body, e.g. match the content of the url.
Bonus points for being to use regex and select which fields you'd like to match against.
As in spider and keep a local copy of the submitted article for search purposes? That would be pretty slick (although restricting it to submissions that get more than 10-20 votes or 2-3 comments might make it more manageable).
(If you're an old subscriber, you'll be moved to the new version in the upcoming days/weeks. Don't fret, if you don't like the look of the new version you can still select the old-style look).