I think the company I work for is the exception, rather than the rule. Since we do VRS for a business, many of our techs (in fact nearly ALL of our tech support team) are deaf.
I work in the IT department for the company, and only recently have we hired our first deaf/hard-of-hearing individual. I've learned a TON from him, and realize he has a work ethic like no other I've seen before. Works hard, and is very creative with communication. He can read lips well, so that works to his advantage, and he can enunciate words and speak quite well.
However, I'm learning ASL as it seems the most effective way to communicate. I think that if more of us in IT become more aware, we can realize there is a HUGE resource available to departments all over the world. Communication is a non-issue with all of the technology today (VRS, IM, e-mail, etc.)