For the past few years, Namie's alternated, I believe.
2004 - Arena, 2005 - Hall, 2006 - Arena, 2007 - Hall, 2008-2009 - Arena, and now 2010 - Hall. I guess that way she gets to have a balance of huge scale concerts as well as really intimate ones, which is cool imo
It'll be really hard to top BEST FICTION Tour, that's for sure, and I don't really expect it to, but regardless, Namie knows how to put on a show, so this'll be well worth the watch