There is absolutely nothing wrong with IPv6. In fact, it will serve to provide new avenues of development as does most technology.
With that in mind, I feel that it would be wise to listen to the experts in here who use applicable technology everyday. From what I have read here and elsewhere, IPv6 requires a significant investment for an enviroment that will not instantly reap rewards. In addittion, it would require a entire reworking of network designs due to modified routes.
Basically, from an amatures point of view, I see IPv6 as more a an infustructure-oriented technology. Although it does provide many benefits to home and business users alike, these benefits are not fully appreciated and do not provide a significant ROI unless implmented at the infustructure level. Even then, the ROI based solely on the transition will, in my opinion, be minimal. With such a high cost of implementation, it will secure the future of internet commerce and expansion, but provide no immediate cashflow.
Basically, attempt to regard Ipv6 as I now regard Linux. They are both tools. They are both available. However, as Nothinman stated, it may not be an immediate option because it is "change for the sake of change." For example, many people tought the usefulness an dsuperiority of Linux over Windows. In addittion, zealots from the other camp tout the cost savings of implementing a Windows server room over a Linux one. In the end, many of those voices go unheard because the cost of implmentation far exceeds any expected ROI. Of course, there are many situations where in fact switching technologies can provide strikingly-obvious benefits, but IMHO, the implementation of IPv6 is not such a technology.
Even from my minimal experience in the corporate world, I still managed to learn that businesses are there to make money, and unless it is absolutely detremental to the companys survival or it provides a significant ROI, it may not be a viable option.
P.S. Mind explaining the shotcomings of VoIP? I am really interested to hear about current drawbacks. I recently read a Network World deathmatch between competing AVAYA and CISCO products, and the main flaws that popped up again and again were the degree of complexity and initial expense that VoIP implmentations required.
BTW, with IPv6, can one implement centralized devices that coordinate ACL's and routes etc, or is each attached device cmpletely independant?
Thanks.