What is Namecoin
Namecoin is a peer-to-peer generic name/value datastore
system based on Bitcoin technology (a decentralized
cryptocurrency). It allows you to :
Securely register names (domains for example), no
possible censorship!
Trade and transact namecoins, the digital currency NMC.
Read more about Namecoin.
What is Dot-BIT
Dot-BIT, the first project using namecoin, is building a
domain name system (DNS) using the .bit TLD. Our goal is
to spread .bit domains by providing resources and tools
to the community, from developers to end users.
[Edit: Perhaps this is being downvoted for not providing any extra information myself. If you truly want a resource that can't be taken down, then it will require some technical effort on your part AND your audience: either .onion hidden services or .bit names, OR just a static IP address.]
On another note, if the motivation is due to SOPA, then SOPA targets all foreign domains (not able to take your server down, but prevent other American's from resolving your domain name -- and I should also not that this was before today, where they seem to have taken that part out of the bill).