Teleconferencing services

I actually had difficulty getting phone numbers in a timely manner for a couple of the major carriers, so I resorted to dialing PIC/CIC codes + 0 so I could ask an operator of the carrier in question.

I've listed the rates here for the major carriers, because I researched them, but I've decided to use GlobalConference.com The rates were very good, the online management console thought out well, and the line-quality was good. A one hour conference with 7 people cost me $20.

 
GlobalConference
http://www.globalconference.com/

Services
Toll-free line fee: $.10/min per person
Non-toll-free line fees: $.10/min per person
No additional fees.
 

AT&T / SBC
1010288 + 0

Business hours:
Toll-free line fee: $0.71 per minute per line + $15 setup charge.
Non-toll-free line fees: $0.40 per minute per line + $15 setup charge.

Outside of business hours:
Toll-free line fee: $0.44 per minute per line + $10 setup charge.
non-toll-free line fees: $0.27 per minute per line + $10 setup charge.

Dial out:
$0.71 per minute per line + 4$ per port set up charge.


Sprint
1010018 + 0 for information

Sprint Conference Center
800-366-2663

Note: Held for more than five minutes before someone answered.
Non-business hours (I wasn't yet aware that there were different rates for business hours)
Toll-free line fee: $0.44 per minute per line + $3 setup charge.
non-toll-free line fees: $0.26 per minute per line + $3 setup charge


Verizon
Verizon Conference Connections
888-561-9405
Only open weekdays, business hours.

Here's all you need to know to set up a conference call...
 
Have the following ready:
Date of the call
Time of call
How many lines
Approximate duration of the call

When you have all that ready, call Verizon conference call center at 800-483-9999.


Review-Zone.com
Conference calls @ review-zone.com

There's a lot of providers listed here.