Unfortunately, Hyperica doesn't qualify for the "safe harbor" protection of the DMCA. We don't allow outside users to upload content to the grid. Everything on the grid is created by me or by trusted partners. So if someone wants to sue about infringing content, they would have to sue me -- and that's fair, since I'm the one who created or uploaded all this content, anyway.
If I think I'm going to be a potential target of lawsuits, I have two options:
I can incorporate. So people can sue my company, but they can't sue me directly, and even though I'm the owner of the company, I'm not personally liable (i.e., they can go after company bank accounts, but not my personal ones).
I can buy liability insurance -- for either myself or my company, or both. If I was in the business of setting up a lot of grids for people, and had a lot of potential exposure, I might do this.
I also have potential exposure here, on the Hypergrid Business site, since folks can upload pretty much anything they want here in the comments -- and since I do have outside users uploading stuff, the HB website is, in fact, qualified for DMCA's safe harbor protections if I register a DMCA agent.
If we start getting instances of people posting copyright content here -- news articles, say, or copyrighted images -- then this is something I would definitely have to look into. Not that I want to give anyone any ideas!