@Christopher: I am willing to participate - roaring to go actually - for two main reasons.
1. Because I think that the product will be stable enough already. I was in a TAP project for Windows 2003 (I used to get a new build every week and put in one of the sites with the highest peak traffics in my country) because I knew that IIS6 will be a far better product than IIS5 - even at beta. Same applies here. I have Exchange 2003 I am very happy for its performance in the last 18 months, I have migrated from NT4/5.5 in one of our locations so I take the stability for granted. I dont consider it a risk. You may but some of us dont.
2. I am not happy with the utilization of the capabilites of Outlook 2003 by my colleagues and I think that it is here that we are going to see the big (productivity wise) improvements in this release. This is a risk I am happy to take.
However I will be glad if during the TAP - if accepted - we are to get some feedback about the usability issues that our office clients will provide to MS (i.e. feedback on our feeback). In addition I will be eager to know if we shall have any kind of centralised support point the way Vista and Longhorn promise (where users ask for support - sent issues to a location that you define, when this happens).
Anyhow everyone gets what he/she deserves (husbands their wifes, companies their IT departments etc). And to philosophise a bit more about it... I will close with an old greek saying... the things that dont get redeemed, do get interest. So even if you dont get your free software you may have saved your company in productivity over that time, or you will get something else in a new company that will need someone to install this software etc etc.