I put 10mBTC in a Bitbond account to try lending them, just now. I would try to follow the 5 principles of bitcoin lending Bitbond wrote in its blog. However, i don't know if can commit more BTC there.
Actually, I would like to know other people experience with lending on Bitbond. As an example i've found a post from user bitswipe who's suggesting most of North American borrowers are defaulting on their bonds (maybe they are scammers); while borrowers from Australia, Italy and Germany refund on time.
Usually the Australian loans payout (experiences of mine) as well as Italian and German ones
Defaulted loans usually from USA and Canada...as well as late payments from Israel
[..]
Probably Italian and German borrowers being in the SEPA (Single European Payment Area) are checked better than North American one.