Depending on how big your group is, you might also check out the classifieds. I see that Kruk, WIB and Sandberg all have at least 6-12 openings. You might want to do some reading of old threads if you are not familiar with the issues of tanking and trade raping, as there is usually a reason that those worlds have so many openings. It looks like both Kruk and Sandberg are worlds that have had problems but are striving to turn it around. Still, be prepared to find some teams that have really been plundered and will take some time to turn into winners.