The most comprehensive list (albeit in a simple format) of bedbug infestations that I have seen is on Caitlin’s blog.
A number of people have started their own registries which, a step above a text list, are interactive: you type in the address, it gets mapped.
Some of these, like the BedBugRegistry, which covers addresses in North America, will allow you to look at the resulting reports (there is a space for maps, but it does not seem to be active yet). This NYC one, Bedbug Project, allows you to click arrows on a map and see the addresses reported. But it isn’t being publicized yet, from what I can see, so I don’t think they have a lot of addresses yet.
The third site, Bedbug City, had some limitations. I wanted to like it, but when you input your address, it only creates a marker on the map. When you click those markers, you expect to see the addresses, but they’re hidden. I assume this was done to protect the site author from lawsuits. I am not a lawyer, however, I think a disclaimer (stating that the data was input by site visitors and that the owner of the site was not responsible for their accuracy, which cannot be verified) should do the same. (Perhaps a lawyer could correct me.)
Honestly, if I go to a bed bug map, I want to be able to see where in my neighborhood the infestations are, and I mean exactly where. The visual effect of “wow, lots of bugs in Midtown” doesn’t do it for me. Also, from a data collection perspective, if you’re asking people to rate their infestations, you need to clarify what that means (rating on a scale of 1-10 is pretty subjective; who knows how bad an infestation is? What are we comparing ours to?) I do like the concept of rating severity. In my experience, asking visitors how many bugs they see within a one week or one month period is a good indicator. I’d check first with an entmologist to see what they thought.
It strikes me that we need one comprehensive database. I think each of these sites has potential, but it would be great if there was one people could really get behind. Because we need one place, not many.
We need the people who put it out to be really clear about their goals and purposes, and to have transparency (if I enter my address, I should be able to see other addresses). Some of the sites above make their goals clear, others don’t.
I do think this can be done by individuals, especially if the government agencies are slow to come up with a database of their own.