Runestones will be freely swappable once socketssocketed. Players can take out runes and put in new ones whenever they wish, without any cost or risk of losing the rune. The [[D3 Team]] has committed to rune switching being easy in the final game, but they have said there will be some sort of limitation, purely to prevent macro-switching exploits. They want changing runes to be easy and forgiving, but not something that can be automated to do in a second with a third party program. Players could use that to change runes constantly, using one for crowd control and another for big damage to a single target, for instance.