Nothing's ever as easy as it seems at first blush.
Take the web. Everybody's first serious foray into web technology was about information, document or transaction self-service. But, as the popularity of the web grows unabated, the shortcomings of this single-minded perspective are becoming obvious. For the most part, features offered fit under four basic headings. Dedicated broadband access like DSL and cable, however, could make callbacks effective for consumer applications as well.