Isabellea: Did you try Orbitz? As of this morning they had more hotels and rooms open than the Disney site. CSR (where I wanted to stay) wasn't showing at all on the Disney site, but I got a preferred CSR room with the discounted rates on Orbitz.
DisMom: This was my first time on Orbitz, it went fine! There are posts on this forum about it, including one "Orbitz users, hold my hand"...try that for details. However, you go to Orbitz, see what the current Orbitz code is on the home page. It is 15% I just don't remember the actual code. Then enter in your desired Disney hotel and dates in the search. Also enter in the above mentioned promo code in the bottom of the search box under "Redeem Promo Code." If the hotels you want are availale, they will show something like "Summer Discount rate" in green under the average daily rate so that's how you know you are getting the new summer Disney discount rates. Go through and book online but keep an eye out that your Orbitz promo code gets entered too, this should show in the price summary. In other words, the Disney discounts show up as the room rates, and the Orbitz additional discount is a promo code. You get both of these through your online booking through Orbitz. OR you can do it all on the phone, by asking if you are getting the summer Disney discount rates and also have them enter in that Orbitz promo code from the home page. I did mine on the phone this morning but I used online to research.
It's not confusing, I hope I am explaining it correctly. You do the entire booking through Orbitz to get both discounts. Once you have done this, like later that day or whenever, call or chat Orbitz to add any kids (if you have any...only book adults during your original booking. The kids don't cost more but Orbitz apparently has some kind of glitch that charges for kids if you put them in the original reservation) and also ask them to give you your Disney confirmation number. I did this after making my reservation (separate phone call) and it went fine. That's the number you will need to do things online My Disney Experience such as magic bands.