In the current version, the transaction that does not get finished, are just cancelled. This will change in the final verison.
My questions about transactions still have not been answered. Nitesend in its current form is NOT anonymous. Its more of a muddling service than an anon service. It just groups transactions together but the inputs and outputs remain the same. Smaller transaction groups (2,3,etc) could easily be traced with reasonable certainty. How does Nitesend address this?
Nitesend is quite much an implementation of this
https://bitcointalk.org/index.php?topic=279249.0The coinjoin idea itself is not a complete answer to the anonymity of cryptocurrency transactions. However, AFAIK, there is currently no any better anonymous implementation on any coin.
There is also some ideas which might be implemented using nitesend to increase anonymity; an extra fee, which could be used to get more wallets to mix the transaction even more; automatic wallet mixing feature, ie all (of those who want) wallets collectively change their coins to newly generated random-sized coins, using nitesend.
Actually, this implementation could also used as a centralized system; an organization could put up a wallet running this, all wallets inside the organization could mix the transactions behind open internet.
Just a few ideas. But you are right, nitesend (or any coinjoin) is not a complete solution. However, it does add anonymity.