I have it at version 1.91. This was initial version 2 development and there is also a 2.0-beta version available. I did not make xmame and xmess dependancies since it can be an either/or choice. Perhaps useflags? Added some newbie info. And yes, it is very similar to gxmame but looks better with KDE. :)
Created attachment 83857 [details] kxmame-1.91.ebuild
*** This bug has been marked as a duplicate of 103865 ***