Just for fun, I made this site that uses Apple's backend API to fetch iPhone reservation info.
For each model (base/plus/pro), it shows a single page that lists what's in stock for each store, so you don't have to click through options only to be disappointed that your store doesn't have it...
You can click on a store's name to link to it, save you from scrolling everytime you refresh.
Hopefully it stays up for a decent while, we'll see! I'm not doing this for self-promotion or anything so I don't think it violates any forum rules, but I'll remove it if it does!
You can find the link in my signature.