Here's a discussion on that topic by Mark Driscoll, James MacDonald (pro) and Mark Dever (con) - Multiple Sites: Yea or Nay? – The Gospel Coalition Blog
Multiple Sites: Yea or Nay? Dever, Driscoll, and MacDonald Vote from Ben Peays on Vimeo.
Mark Driscoll and James MacDonald have employed a multiple-site strategy at their growing churches. Mark Dever holds only one service at Capitol Hill Baptist Church. How do these three pastors justify their contrasting positions biblically? Watch Driscoll and MacDonald seek to convince Dever to go multisite as he asks them pointed questions about the wisdom of their churches’ approach.More resources on the Mult-Site decision from the Gospel Coalition.