I don't think the code is useful for predicting the future. The sites are kinda fun, like horoscopes.
Like I said, with a big thick book, you can search any word or subject and come up with a hit.
Isaiah 53 comes up with dozens of hits relative to the overt text, but only needs 1 page, not over a thousand pages like the doomsday sites.
A good book that gives a balanced study on the subject is "Cosmic Codes" by Chuck Missler. http://en.wikipedia.org/wiki/Chuck_Missler
The two books that broke the story are "The Bible Code" &
"The Bible Code II", both by Michael Drosnin, an avowed atheist.
The subject has spawned a whole new industry of Bible Code debunkers and I've read several of their books.