I am interested in setting up an online ticket vendor, specialising in
small to medium live music events (100-3000 people).  I need to know
about how I might go about this, and am particularly interested in:

*  How receptive these venues generally are to selling via an additional vendor
*  An overview of the ticket reselling process (allocation, billing, etc.)
*  What computer software is in use, and in particular, their ability
to generate and accept e-Tickets that are sold through a 3rd-party
(and how this works)
*  An idea of how much of the booking fees are generally given to the
promoter and how widespread this practise is
*  An idea of how much of the ticket fees are generally given to the
vendor and how widespread this practise is

I require a market overview for the UK rather than any venue-specific
information, and will tip if information is provided about
similarities and differences in other European countries and North
America.