RubyKaigi2010 starts many callings and lookings in the site.
(1) Call for presentations
(2) Call for sub events
(3) Look for sponsors
(4) Look for illustrations
For instance, "(2) Call for sub events" is like JRubyConf at RubyConf2009, and "(4) Look for illustrations" is calling an key illustration for RubyKaigi2010.