I recently found a good site for looking at scuba videos  http://www.scubadivingtube.com/ The site show places to dive and also reviews equipment.
It you have a few minutes check it out.  Maybe even bookmark it.

Recreational diving is still a relatively young sport. Created in the 1950s, it gained acceptance in the ’60s and ’70s, boomed in the ’80s and took great technological leaps in the ’90s. So there’s a good chance that not everything you learned in your open-water class still applies. New research and equipment have made diving [...]

ScubaGuide.com reported the use of dive computers.  Here is their report.
Dive Computers
Scuba computers, or dive computers, are compact digital devices which perform the task of nitrogen management without the need for a watch or dive tables. Combining a timer with a depth gauge, and intelligent software which computes absorption of gases, dive computers are popular [...]