Arduino Dial Up Modem shield

This would be a good project .
Has anybody been able to do basic text /data control / file transfers via a 56kmodem and an arduino ?.

I have a place that has land line but no mobile cell coverage (out on a farm ) so it would be nice to be able to talk to a modem and transfer data or send messages for control or for modem to automatically via an arduino .. send this data to another device via land line so it can transfer this data to an online html page etc or online file ...