Ask HN: Create custom, personal Hacker News email digests

I've had this idea swirling in my head for a while that there should be a service that allows you to setup custom filters of Hacker News submissions and then receive a digest of them either daily or weekly. You could make something similar to a where clause (i.e. `title contains "javascript" or text contains "javascript"`). This would define the list of links you would receive.

Is this something you guys might find useful? I'm thinking of throwing something together as a weekend hack project.