On Friday, we talked about getting to BlizzCon by air. Until teleportation technology is invented (and not deadly) or "The Big One" hits causing Anaheim to become coastal, the only other two ways to get to BlizzCon are by train or car. (Edit: Ok, there is the bus, but yeah, ugh. AishaLove is right. I can't recommend it.)
Trains: Anaheim is a stop on the Pacific Surfliner route. Amtrak can be pricey, but with a membership in AAA and a watchful eye on their specials, you may be able to come up with a price that is comparable to flying. The train stop is just down the road from the Anaheim Convention Center and is close to most of the hotels. Of course, trains take much longer than planes, but the trip can be part of your vacation fun.