All the regular travel websites I've seen for searching hotel rooms list prices without including taxes, and more importantly, resort fees.

How about if someone makes a website which displays, and can search/filter by the room+resort fee? It doesn't seem that hard. Even if the hotels don't like it, a website like this can still be monetized by ads and other affiliate programs. There's a hole in the market, and the implementation isn't even that hard. Why doesn't it exist? If nothing else, I think one could even make a browser plugin that at least changes the source page for listing.