Yea it does look pretty cool, I reccommend rendering it at a larger size though. Set it at 1600x1200. I'm not on a great monitor so I can't really tell if there is much grain. If you have any questions, you can PM me.
Excellent 1st. here! Nigel is right. A higher resolution would be better for people with larger size monitors. Don't take this wrong, but it is a little grainy. Try lowering the gamma & maybe even the brightness a bit. That should help. Just thought you'd like an honest opinion. Again, this is great stuff for a first Apop image! ;)