I just left the following feedback on the "iCloud feedback" form:
------------------------------------------------------------------------------ --------------------------------------------------------------------------
I find it very disappointing that Apple is not supporting Mac OS 10.6 (Snow Leopard) for iCloud, and yet, a Microsoft Vista user can use iCloud with no problem. Microsoft Vista was released in January 2007, well over 4 years ago, whereas Apple's Snow Leopard was released just over 2 years ago, in August of 2009. It is baffling and, quite frankly, insulting, that Microsoft users are being accommodated better than your own Apple customers!!
Please, do the right thing and extend iCloud compatibility to Snow Leopard users.
------------------------------------------------------------------------------ --------------------------------------------------------------------------
I hope that, if enough of us leave similar feedback, maybe we'll get satisfaction.
Also, it looks as though Apple, at one point, intended to support Snow Leopard, if this engadget rumor is any indication:
http://www.engadget.com/2011/08/29/snow-leopard-to-get-icloud-support-in-10-6-9- update/
Oh well...I guess we have to wait and see!!