Maidsafe isn't on there, probably because it hasn't really launched yet, but Storj, IPFS, Wuala and others are. Should give you a good feel for what Infinit is doing.
Ceph is listed as "block" model when it's actually a distributed object store. Part of this is confusion because there has been both a block store and a filesystem built on top of Ceph (the latter named CephFS). But at its lowest level it's clearly an object store, not a block store.
http://infinit.sh/faq?q=&hPP=20&idx=infinit_sh_faq&p=0&is_v=...
Maidsafe isn't on there, probably because it hasn't really launched yet, but Storj, IPFS, Wuala and others are. Should give you a good feel for what Infinit is doing.