In a previous article, a few months ago, it was mentioned that MS were
developing an updated document for the steps to cluster the 64-bit
version of Analysis Services.

I'm the tech lead in my countries first implementation of 64-bit SQL,
and this has been an issue for us. We've put time into getting the
clustering going, but didn't want to proceed to far down the path
until MS released a supported procedure.

Can anyone tell me if this document has been finalised, and if so when
it will be released?

Cheers,
Reece.