for the small biz that we are we are very happy to use AccessLine, our rates are through Costco
http://www.accessline.com/phone_services i recall the rates to be much higher not going through Costco
we switch between the "smart message" and the "smart office" package with seasonal traffic
the featuresets are great for us
* Reasonable Per Min Rates
* Virtual Receptionist
* Full Featured Voice mail
* Instant New Message Alert
* Built-in Calling Card
* Faxes & Voice mail via E-mail
* Store Messages Online
we find that this is a perfect service for us because myself and my 2 other partners are in different locations. Faxes come in to the same number, a page is sent to our cell phones as well as an Email to notify us that there is a fax or voicemail and then you simply listen to your voicemails by dialing your number or by logging into your account on Accessline's website, Faxes come in and can automatically be routed to another fax number and or simply viewed online, in addition Faxes and Voicemails can be emailed as attachments.
Also the staff there was very helpful, they got us our vanity 800 number at no cost with the smart office package.
hope this helps