Comment VoIP Comparison (Score 5, Informative) 250
I found this site to be very helpful in choosing a provider.
I recently signed up for Packet8's VoIP service, and have been very happy with it.
I would suggest that you read each provider's fine print, as some of them specifically telecommuters from their residential plans, and if they find out that you have been using a residential plan for telecommuting, will charge you the commercial rate for all previous months you've been subscribed.