You can set up such tourneys (and others) by organising it 100% yourself. Use communication in the CC forum or other means, publish the rules, times, players, matches... Match results to be posted in forum or via email...
There is software available helping in the organisation of "ladders" which are match tourneys.
Google docs allows publishing of spreadsheets and documents.
Plenty of examples are in the "community tournaments" section, e.g. the Virtual Ryder Cup.
Be creative!