ROOL domains

At the moment, you have many riscosopen domains (.org, .co.uk, .com and .org.uk that I’ve seen). As far as I can tell .org is the most popular and most apt.

If you made all the other domains redirect to the .org one with a 301 Moved Permanently, all the links from other web sites (whatever ROOL domain they use) would point to the same place. This would give you one domain in search results with a higher page rank, rather than lots of domains appearing in searches with lower ranks but identical content.