@etotheipi: That's cool. Eventually though, multi-sig would be much cooler and safer than just secret-sharing a single private key.
This is not a replacement for multi-sig. It is to provide an alternative, flexible way to create and store paper backups. Multi-factor auth wallets (linked wallets) are still coming... with the new wallet files... if I ever finish them...
EDIT: I see what I wasn't clear about -- this is for paper backups, not multi-sig wallet chains.
I understood this. What I mean is that if you store your private key exclusively on paper, storing it with 2-of-3 secret sharing still leaves a vulnerability when the shares are imported and combined (mitigated by combining in an offline clean computer, but still). If you have a 2-of-3 multisig address, and store the keys for that on 3 distinct pieces of paper, you get more security.