Hi Jahmth,
Welcome to the forum

It is great you came out of lurker mode
I think your idea is a great. My first thought is, what interests you? What are your skills and areas of expertise? Since you are going to be hosting the teleconference it is a good idea (at least for the first few) for you to host a conference that you know something about or enjoy talking about. Of course you want to be sure the topic is one that interests your audience. Perhaps during the first teleconference you can ask everyone what topics THEY would be interested in and go from there.
For starters, talking how VAs and specifically about how you can help the business in your area is a good start, but you don't want it to be all about you either. Is there something of interest specific to your local area's businesses (maybe an upcoming business fair) that would interest the callers?
I could probably go on forever here, but hopefully that is enough to get your thoughts churning. I am sure others will chime in too!
Again, welcome and I look forward to hearing what you come up with.