Hi,
Long time ago I purchased domain cswp.cz in order to use it in same way as enwp.org for czech wikipedia (cswp.org was taken by something).
I think that it would be probably better if it was owned and maintained by WMF rather than me, but I don't really know where to ask, neither if ops are actually interested in maintaining it, the script which redirects the page is pretty simple:
<?php $uri = $_SERVER['PHP_SELF']; $target = "http://cs.wikipedia.org/wiki"; header ("Location: $target"."$uri"); exit();
I can't really provide any data on usage of this domain, because I never collected any, but if there isn't any long-term plan for global wiki shorteners I think this domain could be used.
Thank you