American Theater Web -Search for a Theater or Production - Read Reviews - Buy Tickets - Get the latest News. What more could you ask for.
Broadway - Takes things just a step farther - Besides every thing else they have to offer you can view Sneak Peeks Online (requires latest Shockwave Plug-in).
Festivals.com - Celebrating the World of Festivals and Events.
Festival Finder - Only covers music festivals, but covers them all, from Alternative to Rock.
Travelers Guide to Great Sporting Events - The title says it all. If you still didn't find what you are looking for, try the next three, the don't just sell tickets.
Ticket Web - Does it for less covers more.
Ticket Master - Music, Sports, Arts, Family Favorites - Find the venue and the tickets.