MADC (Madame Alexander Doll Club) convention "Winning the West" is in a few days - June 20—23. It will be held at the Marriott in Albuquerque, New Mexico.
Find out more at this link: http://www.madc.org/index.htm
Here is more information: http://ufdc.org/convention/
IFDC (International Fashion Doll Convention) will again be at The Orleans in Las Vegas, Nevada. Dates are July 25—28, 2012. The theme is "Shock, Rattle N' Roll" and it is the IFDC's 10th Anniversary. This convention celebrates a variety of modern fashion dolls such as those from Integrity Toys and the Tonner Doll Company. There is a large group of BJD collectors who also gather during the event.
Find out more at this link: http://www.ifdconline.com/
The inaugural Ken Doll Convention will take place on September 13—15, 2012 in Chicago, IL at the Sheraton Chicago O'Hare Airport Hotel. The theme is "Space-Age Bachelor Pad."
Click on this link to get more information. http://www.manbehindthedoll.com/
Look for the part of the page that says Kenvention.
Click here for more information: http://www.moderndollcollectors.com/
More information: http://dawnoncapecod.com/index.html
There are several BJD regional conventions in the USA which I found in my search. I don't know if any of these groups are well-established. I recommend you do a search on Google to find groups for your specific needs as a BJD collector. In addition, on-line fora such as Den Of Angels (highly recommended and supremely well-moderated) and Zone of Zen (boardhost.com layout) can offer a great deal of information about this type of event worldwide. Click on either logo below to go to the site of your choice. Both require registration.