There's also a command line search and web service which searches only Hacker News. See http://news.ycombinator.com/item?id=184707 http://news.ycombinator.com/item?id=182374 http://news.ycombinator.com/item?id=183706

There's also www.searchyc.com and http://y.soho.lt/

I created this for myself (it took maybe two minutes to make). It limits your search results to Hacker News and Reddit's Programming section. The results were skewed in favor of Reddit, so I added "Hacker News" as a hint keyword, which creates a more balanced search result distribution.

It is probably not as complete as the dedicated Hacker News search someone else created, but it does span two sites, which is helpful (to me anyway).

nice. very useful.