I read your book, it was great! I had a very similar experience when teaching my son to read! I really loved how your book was written and have lent it to a friend who is about to have their first baby. I'm hoping that I can gift them an early learning gift without them thinking I'm crazy Hopefully the book will get them excited about the possibilities.
I just did a quick google search to try to get you info on the history behind Utah's immersion programs and where you can find schools near you.
You can read this from BYU: http://education.byu.edu/new/node/46187 - The Utah Model: Why Immersion?
Here's the list of schools: http://www.schools.utah.gov/curr/dualimmersion/ - I'm not sure if this is the most up to date, so you may want to call the district to find out if they are offering programs at other schools in your area.
You can google to find additional or better info. There have also been a bunch of articles in the news over the past few years regarding the programs.
When I was researching schools for my son, I looked at what language was being offered, as well as how the public school was performing. I looked at Greatschools.org to get the school ratings. This helped me make a decision on which schools I wanted to apply to. I was hoping to find the best rated school coupled with a language program.
Once you find a few schools you're interested in, call them right away to get more info and ask questions. They should be doing the language immersion parent information meetings in January/February to discuss the program and how to register for it. The immersion programs start in 1st grade, but you can go to get more info. The school websites usually have a page for more information on the immersion programs too.
If you have a good idea of which schools you want to attend, but they aren't in your school boundaries, make sure you call the district office and apply for open enrollment now. You can apply for more than one school. There is often a waiting list to get into schools with immersion programs. You are accepted into a school based on lottery. Don't expect to be able to apply the week before Kindergarten and get in. I'm not joking when I say look and apply now since she's heading into K. If you miss the language school for K, still try next year to get into the school for 1st grade. The immersion programs don't start until 1st grade, but you have a better chance of getting into the immersion program if you attended kindergarten there. We got lucky and they opened up another Chinese classroom at the school we wanted to get in to because they had SO many students who applied. We were able to get in for first grade so we switched after attending Kindergarten at another school (that did Spanish immersion, just in case we couldn't get into Chinese).
Since you're in SLC... if you're interested in Spanish, you should check out McKee Language School. It's an expensive preschool, but I am a big fan.
Please send me a private message if you want more information on the immersion programs, our experience with them, or going to kindergarten already being able to read