I've been thinking about that and I had a bit of a bad feeling after uploading the firmware I blinked. The firmware is actually something Canon created and therefore they hold the copyrights. As far as I know, we're not allowed to redistribute the firmware without their consent, so I guess they could have these forums shut down for that. I do suggest removing the links to the firmwares and have the developers (who don't have a specific version of a camera, else they'll be able to blink it) figure out a way to obtain dumps from others outside these forums, when they require them.
I guess this project is still too small for Canon to care, since they have been asked about CHDK+warranty so they should be aware of it. They might not have read the forums or found any firmware dumps, though, could also explain why they haven't responded. Maybe they just don't care and like us doing this stuff

I've seen "the community" implement features which were then implemented by the manufacturer in a newer generation/model.
Still, only a small number of people actually require a firmware dump, so I don't think it's necessary to make them publically available to anyone. I think I'm going to take my S5 dump offline in a bit (after I've had a chat with a few people) and/or move it to another location, as I think it also violates my hosting agreement.
@GrAnd:
The same goes for torrent sites. I haven't closely monitored all cases in all countries, but I do believe that various sites were shut down because they know what's behind those links. Money is not really an issue, Canon holds the copyright so they could do some damage over here. The fact that they're taking out features in order to make more money suggests that they *are* in fact losing money, because people buy cheaper cameras with the same functionality. Of course, this doesn't really happen on a large scale, but still.