I've only just started doing WAL backups, and so far am not able to keep a running backup due to lack of hardware. Obviously I gzip the WAL fioles, but I'm fast running out of disk space. I have a second standy server with 200GB disk, where I store the compressed WAL files, which quickly fills up. Archiving is difficult simply because the server is in a server room in Johannesburg 1000km away. We pay them to keep the server powered up, safe, and connected. They can slip a DVD into it, but that requires me to book it in advance, and it takes maybe a few hours before they can do it.