In max 2009 is it possible to move around the scene with the array dialogue box open, it seems to freeze the viewport when you open the dialogue box which is tad irritating, dunno if this has been changed in max 2010.
Just gave it a try in 2010 and nope the viewport is still frozen there. The array tool hasn't been updated in ages. Maybe you'd like to try a 3rd party solution? http://www.scriptspot.com/3ds-max/procedural-array http://www.maxplugins.de/max2009_64.php?search=&sort=Author