Selling your expert advice - online options

I’ve identified several different providers of pay per call technology.

1. AT&T Group:

- Ingenio Live Advice

- Keen Personal Advisor

- Ether

2. Kasamba (soon to change its name to LivePerson)

3. BitWine

There may be others, but these look to be the major players in this market. My next step it to dissect them, poke them, prod them, and see how they work.