thanks for the info.

i tried to set it up by doing the following: from my IOS 5 device (which is fully up and running under iCloud), i created an event on one of my iCloud calendars and invited myself to the event via one of my alternate email addresses.

when the message arrived, i could only see URL's with domain "www.icloud.com" (nothing that looked like PXX-caldav.icloud.com). i also looked in the .ics file that was sent, but it did not seem to contain any references to icloud domains, either.

am i missing something? do i need to know the specific PXX-caldav.icloud.com domain - i.e., does it matter which value of XX i use? (are users divided up across different servers? or is this just an array of servers all capable of serving any user?) if so, any other suggestions as to how i can find out my XX value?

in the invite email, when you click the link to download the ICS file, your browser address url would flash for a second as it redirects you to a pXX-caldav.icloud.com host then back.