Engineer Jeff Miller put together a simple but well thought out Python bot that tweets Hacker News stories:
Here’s a robust cure for Hacker News overload: use score thresholds. This solves the problem of too many stories by cutting out low-scoring noise while still leaving behind those links interesting enough to have been upvoted by the HN community.
I’ve created a handful of Twitter and RSS feeds that apply score thresholds to Hacker News. Stories enter the feeds in near real-time as soon as they reach X points on the main HN site.