Normally you can look up smartcoins on cryptofresh and view all the debt positions there, but it has said "Chain reload in progress... we'll be back in a few minutes!" for over 12 hours now - I've withdrawn my vote for its operator as a witness, at least until I see an explanation for the downtime. Bitshares-explorer.io is still in early phases of development and lacks useful information for now, but should become available at some point in the future.