I second that.
We are not going to invest the time, money, and hardware into a solution that may not exist in a very short time (I realized that I just opened up for arguments about how the money and hardware wouldn't be wasted but I hope everyone will see past the generalization). We would love to move forward with implementing Zimbra! But we are coming from an ISP/POP setup and there will be a fair amount of work for a 2-3 person IT staff (100+ boxes) in server setup, migration, etc., not to mention money.
There is no way we 'hang our hats on' and sell Zimbra to the powers that be without
knowing the short term future of the product. It is an unecessary risk. When there is some formal solid official statements (after March 15th ish

) from Yahoo as to their future or from Zimbra as to their viability after a possible takeover we will make our decision. Until then we continue watching, waiting, and looking at other options.
Don't get me wrong - We want to deploy Zimbra!
-Anxiously awaiting better answers-