@LampRabbit: Thanks. That is indeed the process I was getting at. I'm not sure what you mean by "change the tag to something different" though. All the objects I'm trying to find have the same tag. I did figure out how to make an array and add objects to it using Arraymaker. The biggest problem I'm having now is that I can't figure out a way to iterate through all the tagged objects in the scene and count each one once. "FindGameObject" appears to only be able to find one object and then it stops. I'm pretty new to Playmaker though, so I'm probably just missing something.
@Vallar: Thank you, too. It probably won't work in all cases where I'm trying to get all objects with a tag, but in the case of choosing a spawnpoint, I think your suggestion will work perfectly. Having just started using this, I'm still trying to think too much like a programmer and was looking for the action equivalent to the scripting command. I didn't realize there was an action to just pick a random object.
Still, I was a little surprised that there isn't better integration in Playmaker for arrays. There is Arraymaker, and it does some cool things, but it would be nice if there was something like just a checkbox next to a variable that said "is array", or something like that, but Playmaker is a pretty solid program, so I'm guessing there are very good reasons for it being set up the way it is. Definitely no complaints.
Thanks again.