Thu Mar 15, 2012 12:42 pm by lax
Inner Space build 5552 adds experimental support for Diablo 3 (it's technically working, but there may be issues; please report any problems you run into). 5552 is currently the development build of Inner Space. To try it out, right click IS in the system notification area and select Patcher, check "Download development (test) patches" then close and restart Inner Space to let it patch up.
Launching multiple instances of Diablo 3 on the same computer will not currently work, with or without ISBoxer. (Except if you install another copy of Windows on a Virtual Machine, but that's not the same thing) I wouldn't rule out support for same-PC Diablo 3 in the future though.