I've investigated full backup apps, like Titanium Backup, and they require root access (which we don't have on the eDGe). So, the best you can do is manually back up bits and pieces.

Files you can copy across the mini-usb link to your PC fairly easily.

However, application data, such as browser bookmarks, etc., aren't accessible so you would lose those (unless the app has some sort of "backup" function built in, and in the case of browser bookmarks there are apps to backup, restore and even sort them).

I'd really like to see a full backup facility in the eDGe.