Conference call service

Two services that I can refer you to as I have worked with both are:
Uberconference - great for phone conferencing service, Canada local numbers and Toll Free numbers available, recording of conference calls, great audio and host controls, but very limited screen sharing and billed in USD. Uberconfernce service provides good value for advanced features, if they are needed.
Zang or Avaya Cloud Spaces - great low priced option if you are looking for more basic conferencing services, allowing attendees to join via PC, but allows you to pay $5/month per host to add in dial in functionality which allows local and toll-free dial in numbers with a PIN number. Spaces lacks features like Recording your call but provides the basic call conference service at an incredible value.

Terrific! Thanks for the suggestions!

You can also try FreeConference.com
They will give you telephone and access code so people can just dial in.

I like GoToMeeting for conference calls. It provides voice and video conferencing.