More than one person can use it, however Webbrick is single threaded so is not efficient.
You should use mongrel cluster, with a load balancer in front of it. Apache or Pound are two load balancers that can be used.
matt wrote:
1) Pound: http://blog.tupleshop.com/2006/7/8/deploying-rails-with-pound-in-front-of-mongrel-lighttpd- and-apache (the apache & lighttpd stuff is not nessessary but interesting as a sidenote)
