The Wikipedia publishes under the GNU Free Distribution License, whereas SL publishes under the Open Content License. Although this difference could cause copyright issues, both licenses have the same goal: to enable and encourage copying and reuse. Hence, there should not be major issues when one complies with either of the licenses.
See the /Copy Discussion, giving rise to the above section.
For a collection of Wiki websites, see Go Wiki Wiki
Also see the list of mindsport wiki for wiki's on other mind sports