Is this normal to have so many VBits conferences? Are any of these seen as the "main" conference. Are there any differences in content?

San Francisco
February 12-17, 2000
Stockholm
May 22-24, 2000
Chicago
May 23-26, 2000
London
May 30-June 1, 2000
New York
June 18-21, 2000
Orlando
September 19-23, 2000
Munich
Fall 2000
Tokyo
Fall 2000

Coming from the Fox world, we are lucky to get 1 main conference at 1 or 2 smaller ones per year.