For those of you unfamiliar with the site, HollaBack NYC is a blog where people can submit (anonymously if they prefer) incidents of street harassment, often complete with a picture of the perp. The idea behind it is, of course, that no-one should have to accept street harassment as a given, and that it's good to have a way to, for your own sake and others', have a record of the harassment. It's somewhat of an institution, and has been around since 2005. Since then, it's grown into a larger movement and there are similar websites for other cities.
Now, they're planning to make it into an iPhone app (and are seeking funding). My understanding is that the app would partially serve the same purpose as the website, but in an easier, more immediate way - get harassed, use the app. It would also allow them to expand worldwide. But, more excitingly to me, it'll also serve as a means to collect data. How large is the problem? What neighborhoods/states/countries are the worst? What kinds of harassment are most common? How does time of day/ year change this? And could we see maps of that please?
If you're unfamiliar with the issue, or just with HollaBack itself, I definitely recommend taking a look at the site, or at least the FAQs.