1.) It is a lot! The frontpage in particular is almost overwhelming. Browsing by individual topics makes it a bit more digestible. One element I could support is a parameter you can supply in the URL to limit the amount of articles returned per source. The challenge with providing 15-30 high quality links is the "human editing" element required to do that effectively. I'd like to avoid that if at all possible, as well as not get into the business of harvesting visitors' personal information. There's no tracking or harvesting going on here whatsoever and I intend to keep it that way.

2.) Great idea, I could perhaps add an [hn] tag to those stories to preserve the link to the discussion.