Unity script that allows for particle motion while Time.timeScale = 0. See http://www.asteroidbase.com/?p=569 for context.

TimeScaleIndependentParticleSystem.cs

using UnityEngine;
using System.Collections;

public class TimeScaleIndependentParticleSystem : TimeScaleIndependentUpdate
{
	protected override void Update()
	{
		base.Update();

		particleSystem.Simulate(deltaTime, true, false);
	}
}