Magic Particles (www.astralax.com) - is a special effects editor, based on particle system.
Integration to OGRE really is not hard, but we have not time for it.
For man, who will integrate our system with OGRE we will provide free license for Magic Particles API.
If you are interesteing in integration, please, contact me by e-mail: sales@astralax.com or ICQ: 330374344.