ICloud :: Switching With Snow Leopard?

I believe I've researched enough posts here on Apple Discussions to tell me that what I want to do is possible, but I want to confirm it before I take some irrevocable action. So, first I'll describe what I want to do, then my understanding of how to do it, and then ask my questions.  I want to keep my mac.com email functionality for my primary account, my aliases, and my email-only accounts—all of which use mac.com addresses.For now, I don't care about contacts, calendars, bookmarks, or any other syncing except mail server syncing with my SeaMonkey mail client on multiple Snow Leopard Macs.I can't install Lion (yet) on all of my Snow Leopard computers. I have some software compatibility issues that have yet to be resolved, and one machine (Macbook Pro Core Duo) isn't compatible with Lion at all.I have several IMAP and POP mail accounts that forward to my primary mac.com address, and I would like that to continue. It's my understanding that I can log into my MobileMe account, select the "Not all devices meet requirements" option, agree to the iCloud Terms of Service, and then click the Move to iCloud button to use Apple's mail services with iCloud after MobileMe ends. Here are my questions:Will the move to iCloud work as described?Do I need to claim I have Lion installed on all devices? (I don't.)Will all of my existing mac.com email-only accounts and aliases continue to work after I move to iCloud? (I seem to recall reading somewhere that the paid-for email-only accounts will work, but the aliases wont...but I'm not certain that's correct.)Will I have full access to all iCloud features on any Mac on which Lion is installed?I currently have some web content hosted on my iDisk, and I understand that the iDisk will disappear on July 1. Is there some equivalent functionality in iCloud, wherein iCloud will host browser-based web content?That doesn't appear to be the case, but I figured it wouldn't hurt to ask. 

Info:
MPQuad-Core2.8GHz,32GB,23"CinemaHD, Mac OS X (10.6.8), MacBook Pro 17"; 10.6.8; 2GB RAM