It turns out my business liability insurance won't cover this site and it risks me losing my insurance across the board.  Because of that, I won't be developing bidfast any further.

Quick post-mortem: Never took a single BTC from anyone, and paid out all outstanding debts.  I will delete all personal information from the database.  For me, ~$100 and ~ a week's work was an acceptable cost to run an experiment to test the viability of a site like this. 

If anyone would like to purchase the code and/or domain behind the site, please PM me. 

On to find something else, I suppose.