[Rdfapi-php-interest] SPARQL endpoints

Hi, a second question for today.
Who is responsible for the sparql endpoints at
www4.wiwiss.fu-berlin.de? Are they "stable"? We need some Sparql
endpoint to use as part of a proof-of-concept-demo and yours could fit
in nicely. Are they documented somewhere or could someone post a list
of classes and properties?
All I have found is this on http://esw.w3.org/topic/SparqlEndpoints:

World Factbook (Freie Universität Berlin)
   *  URL: http://www4.wiwiss.fu-berlin.de/factbook/sparql
   *  webform: http://www4.wiwiss.fu-berlin.de/factbook/snorql
   * status: alive
   * data exposed: Country statistics from the CIA World Factbook

Project Gutenberg Metadata (Freie Universität Berlin)
   * URL: http://www4.wiwiss.fu-berlin.de/gutendata/sparql
   * webform: http://www4.wiwiss.fu-berlin.de/gutendata/snorql
   * status: alive
   *  data exposed: Data on authors and literary works from Project Gutenberg

http://www4.wiwiss.fu-berlin.de/factbook/snorql seems to work but
http://www4.wiwiss.fu-berlin.de/gutendata/snorql gets redirected to
http://10.119.0.68/

Greetings
Bart