First and foremost, you should keep a current backup copy of your subscription list. It's very easy to do.
- In FeedLand, choose My feed list in the first menu.
- Click on the white-on-orange XML icon, in the upper right corner of the page.
- That will open a standard OPML version of your subscription list. This is the format that all feed reading software understands.
- In your browser, choose the Save Page As command in the File menu (or something like that, there are lots of browsers) and save it along with your other backups.
- You can also automate it if you can run a script that gets stuff over the internet. Once a night would be fine, not a huge burden on the server.
I added another way to preserve your feed list, using localStorage.