Ok, i just played a bit with arcadia interface FDB ^^ (and yes, thats some simple move some files from A to b, i know) ^^
Also if you use their bagframe.lua and xml you can get a glimpse of 12 bags being usable. Off course its not working out of the box, you have to edit the .lua i guess and also some things in SQL. Well, thats nothing for me unfortunately.
I'm also wondering a bit how they handle the data. Tons of stuff is unchanged in interface and maybe unused, but its till in there. And they have a lot of new HD graphics in there like the character frame has a higher resolution. But if you are not a .lua master i guess you can not do much things with the stuff in Worldxml, because if you use something from it you litteraly destroy your interface