Check out this whitepaper from Speakeasy on the benefits of business VoIP:

Speakeasy Business VoIP is a high-performance, no-maintenance Hosted PBX solution—Now we’re talking.
At
Speakeasy, our whole business is helping small businesses. Speakeasy
Business VoIP works harder and smarter than a traditional phone system
to meet your unique needs. It’s a complete solution that includes your
choice of business class connectivity, employee calling plans, long
distance options, and phones.