Bridge failure is really upsetting. I think the manufacturers charging $20-30 for a single bridge have some responsibility in this. As a retailer we see lots of opportunities to have good margins on various products. As a climber and a husband I dont think the rope bridge has to be one of these.
We sell Eye and Eyes for what I think are a fair price of $24... making one of these bridges (
http://www.treestuff.com/store/catalog.asp?item=15088) is exactly the same amount of work (and more liability) but we sell them 2 for $20 in the hope that people replace them more often.
Using scaffold knots (less adjustable than an anchor bend but not requiring the sewn stiffener when used with an appropriate amount of tail - IMO) is even more affordable.
I have to believe these types of fatalities are avoidable.