Thanks for the info, product team. I know you guys are working hard, and you have created some AWESOME software! So, please take what I say below in kind, and with no malice.
Unfortunately, we've too have been hit by this "sorry, you developed in 32-bit and deployed to a 64-bit server" issue, and the documentation from Microsoft has been lackluster at best.
I have a full deployment that works great on all the 32-bit systems we have, but a common format for getting data, CSV, appears to be a low priority issue at Microsoft.
If you're going to convince all of us to move to your 64-bit OSes, since you're dropping support for all 32-bit OSes as of Server 2008 R2, you had better make sure all the technologies that worked in the 32-bit versions work on the 64-bit side. Or, well, repeat the Windows Vista / Windows XP upgrade mess...
Best,
Auri Rahimzadeh
Engineer, Author
Contributor, Consultants Corner, ASP.NET Pro Magazine