Had a chance to try it - great stuff, quite useful.
One thing I'd like is the ability to set a repeat count - with an "On Finished" event - that would be perfect, like having a barrage of explosions finished of with a big one.
It would also be cool for something like, say, dripping slime - couple of drips drop and stop - then begin again, without the need of extra variables and such.
In fact I like this behaviour so much I made a new icon in the style of the native ones - perhaps you'll like it and use in future versions:
[attachment=1:tdsvpj7u][/attachment:tdsvpj7u]