Overstock used to maintain a wikia on the 2.0 projects.  Overstock discontinued maintaining their wikia and later launched their own ledger called tØ.  

tØ is a blockchain ledger but not a cryptocurrency nor a solutions platform for the public.  It is not a "2.0" and not a "1.0" project but something entirely else: "blockchain securities ledger" best describes it.

tØ was designed to do one thing: securities listings.   tØ already has 10 stocks listed on it but it is not accessible to the public.  I don't think Overstock will ever make tØ public for download.  As far as I can tell tØ is closed source and that means most companies would never use it.  Would you list your company's equity on something that could have backdoors and other vulnerabilities?  There's no reason to when the future will probably have an open source securities ledger.