Oh, I just wanted to pass along that if you have or get a 2008 Entertainment book, the entertainment rate at the Howard Johnson will be around $69 plus tax per night. You'll have to call the hotel direct (DO NOT call the 800 reservation number) to get the rate, and during busier times they may not offer it, but it's worth it to give it a try. Many people are successful. Also, you'll have to bring your entertainment card to show at check in.
You'll also get lots of great information and tips over on the Disneyland boards!
Just for reference, I looked up the different airport distances from the Disneyland Resort. Personally, we always just book the flight that gives us the best deal, but SNA is the closest and most convenient to Disneyland.
SNA - 13.6 miles
Ontario - 32 miles
LAX - 34.5 miles
And Gumbys7227 is right about rush hour. If you happen to hit rush hour traffic, that nice leisurely 25-35 minute ride from Ontario or LAX to the Disneyland resort could turn into an hour or more. If you're traveling the freeways/highways between 10:00am and 4:00pm, you should have smooth sailing, provided that there's no accidents.