What Would We Do Without SourceForge?

vrmlguy asks: "While looking for something else, I found this discussion of SourceForge. As the authors point out, a great many Open Source projects have moved to SourceForge. I would like to compare this to another dependency that turned out badly. Deja.com provided a service that many, many people had depended on for years. (See this posting for a more jaundiced view of this dependency). Suddenly and without warning, they went out of business. This left quite a few people high and dry. My question is, what would happen if (heaven forbid!) something similar happened to SourceForge? I realize that 'everybody' affilated with a given project has their own copy of the piece that they are working on, but does any one person have a copy of everything any more? How hard would it be to put Humpdy Dumpdy back together? Are there any mirrors? Are they safe? Inquiring minds want to know!" If SourceForge were to close its open ports for the final time, tomorrow, I'm sure the community would find a way to continue. With that said, however, what are ways we can mitigate the damage if it happens?