The Short+Long baskets described at
https://bitcointalk.org/index.php?topic=103699.0 act, in effect, as floating rate secured loans.
I had been looking into other methods of providing secured loans, but this basket system is so simple and elegant and multi-purpose (in that it also acts as a means of shorting or going long in an asset), and makes "debt" so simple and easy to trade and to discover prices, that I am now thinking of just going with these baskets instead of worrying about the other various ideas of how to provide lines of (secured) credit...
-MarkM-
