Inputs.io was hacked on November 7th, 2013 and the service has been discontinued. See https://bitcointalk.org/index.php?topic=248803.580 The article is kept only as historic documentation.
Inputs.io was a free Bitcoin web wallet that leveraged its own off chain payment network. Inputs implemented numerous security measures, and featured instant, fee-less offchain confirmations with an easy to implement developer API.
Inputs.io is no longer operational as November 7th, 2013. 4100 BTC was stolen from Inputs due to a compromise of the server hosting account.
Inputs.io processed more than 235,000 BTC during it's operation.
Inputs.io was supported by the following sites, along with dozens of faucets.
Inputs.io was a Bitcoin Foundation Silver indusry member.