To raise this discussion up a bit, I can think two other related reasons why there may be less corporate diversity in the IETF. The first is that it's possible to build applications and businesses that take advantage of the Internet without having to come to the IETF to standardize anything. The work of the IETF (and related organizations like W3C, IEEE, etc.) have made this possible. A success problem so to speak. The second is that it's very hard to make changes at the IP and transport layers and have them be deployed in scale given middle boxes. Many organizations have stopped trying and focus on making things work on top of http. This also doesn't require coming to the IETF. My point in this, is that things have changed and it's not just about how the IETF works, makes decisions, takes on new work, cost of registration, travel, etc. Also, I am not making a value judgement here, only trying to acknowledge reality. Bob