This is what is published on their website:

Due to problems ranging from the financial and combined with other factors, which would cause us great damage, the event organizers BR Conference 2010 – ColdFusion and RIA Connection, unfortunately feels obliged to cancel the event, avoiding greater damage if continue with the same addition of lacking a commitment to quality now signed.

It is unfortunate that decision, because we worked hard for it, but we can not be irresponsible and play along with the minimum of security for the quality of the event.

We are contacting the participants registered in order to arrange the return of the payment now confirmed.

I am sorry if harmed in some way, but would like to clarify that provision and did not miss work to hold an event of this size in Brazil. Unfortunately these and other events prevented us from moving forward with the BR Conference.