I don't read Harry Potter....not because I think it is Satanic, but because I am not really feeling children's books as a 23 year old man.
I did however read the Chronicles of Narnia, and I am surprised that Richard Abanes in the above article would state that Connie Neal doesn't know what she's talking about. He further tries to use Narnia as an example to prove his point.
If you all recall, the children in the first volume were all English children during World War II (or I). There were in fact two separate dimensions if you will, but C.S. Lewis (the author) was himself a theologian who wrote plenty of non-fiction works about Christianity.
Knowing Lewis' background, and then picking up say "Companion to Narnia," one can see not only the MANY Biblical allusions that Lewis makes, but also the influences that CS Lewis also had on JK Rowlings work.
Like others, I do not agree that HP is Satanic, but do what's best for your kids.