I was able to provide a few suggestions of where he could park some coins as I was comfortable adding 1000 to his current account but he still had some additional ones to park. What was obvious is that he had a view on different people and how secure the different schemes might be. Having mulled this idea over for quite a while, and acknowledging that I will probably be seen as competition, I am opening this up for some additional feedback:
1: Deposit takers and issuers of fixed rate bonds could apply for a credit rating. This would require various metrics like assets/liabilities, length of time in business, verification of identity/location etc. If information doesn't get divulged, that weakens the score. Information would not be made public.
Probably a simple AA/A/B/C range will be sufficient, perhaps with a "+" or "-" To obtain a rating would involve a fee (thinking of 10BTC currently) as this helps separate the more serious from the less serious people and the object is to provide confidence for people and their coins.
These rating would be published on the "Who pays what" thread.
2: Depositors could also request a summary of basic information. People do this currently by reading the threads for the chosen scheme. However, this doesn't contain the basic disclosure you would expect if you're handing over a bunch of coins to someone on the other side of the world. So, for 1BTC you could get a report with some basic metrics to help decide if XYZ-bank is worth the risk of a few percent return on your hard earned coins. (undecided if it would be 1BTC per company or a summary table of all deposit takers).
I bet Nefario would integrate this into glbse