A website called Bedbug Registry was designed to help travelers check if a hotel has or hasn't been infested with bedbugs. View first-hand accounts of people who have experienced staying in a hotel with bedbugs! The website has a database of hotels' and buildings' reports from across the US and Canada. So far, I have not found any hotels that we've stayed in in the past, and that's a big relief.
Bedbug Registry guarantees anonymity to anyone who will report about a hotel with bedbug infestation. However, it also leaves a disclaimer that they cannot guarantee the veracity of bedbug reports submitted, and encourages people to contact them for any errors on the site.
More than a service to travelers, I think Bedbug Registry can also serve as a good warning to hotels in ensuring that their place is free of bedbugs, lest their hotel end up being listed on the website.
Now that summer's officially kicked in in this part of the planet, a Bedbug-free vacation could help travelers make the most out of the warm season.