silenda.de does no longer exist...
Silenda is constantly being updated with new material locations post merge and as indicated, is being moved to new server hardware. One of the purposes of Yubo Maps is to provide access to the information when the site is down for maintenance.
BTW, thanks to all Bunnies and other peeps who are uploading new material locations. Registered users can add new locations with the "Add a Spot" link.