[ryanwaggoner]

There's a bunch of these services out there, but here's a couple that may be interesting:

http://www.postful.com/ http://www.l-mail.com/

Both look pretty clean and offer various capabilities to send lots of letters more efficiently, including an API.

[mrduncan]

Compared to Dustin's though, both of those hurt my eyes to look at. This reminds me of Posterous, blogging is a crowded market but they differentiated themselves by being beautiful and dead simple. Competitors are good, it just proves that there's a market for a service like this.

[ryanwaggoner]

Pretty much everything hurts my eyes compared to Dustin's work :)

In all seriousness, I thought Postful looked pretty good.

[diN0bot]

beauty and pain are in the eye of the beholder...

[techiferous]

Up to a point... http://www.angelfire.com/super/badwebs/

(warning: autoplay music)

[jsdalton]

Another one:

http://www.postalmethods.com/

I remember looking at these a while back, and I believe Postal Methods is more robust than either of the two you mentioned (and pretty cheap too).

[JeremyStein]

I use ezgram.com. Same idea, same price.

[goodkarma]

I love the idea of a printed letter API (like what postful.com has) as a solution to send automated letters to people. First one that comes to mind is to send a letter to someone if they do a chargeback or their credit card was declined.

I look forward to implementing something like this!