If you are looking for an apple iPhone/iPad/iTouch application for taking the hassle out of battles (but keeping all the excitement) then please check out:
Risk Battle Dice
Built by Risk players for risk players the system is flexible and efficient.
It is the only iphone app available that lets two players go head to head controlling their own dice. It lets you both roll at the same time or let the attacker roll first then the defender.
It offers auto-roll for one or both players and it will let the attacker easily keep charging with the same army after a victory.
Hope you like it!