Actually, I've talked to search engine companies about syndicating content between blogs and they have said over and over again that there is no issue with this.

Everyone has a blog roll, and most blogs have a "WIN Grid" at the bottom (a feature I created at Weblogs, Inc. where at the bottom of engadget/autoblog/joystiq/etc you see the headlines from the other sites).

From what I've seen said at conference the search engines only pass a small amount of page rank from these areas so it's not a major deal to syndicate your content around.

HackADay is now owned by Mahalo (we didn't sell it to AOL in the WEblogs, Inc. sale for obvious reasons... like hacking TimeWarner cable boxes :-). There is nothing wrong with syndicating headlines between mahalo and HackAday. If we're told there is we will stop.

This is just the SEO community upset at me for saying that "seo is BS" back in 1995!