I am curious to know ... if Reader X is the current version, why it does not appear when I do "Check for Updates" from Reader 9.4.1. I support many users and usually tell them to check for updates, but in this case, they will not even know there is a newer version available. Thanks.
if Reader X is the current version, why it does not appear when I do "Check for Updates" from Reader 9.4.1.
Adobe Reader X isn't a update of Adobe Reader 9. It is a new version.
As Bernd mentioned, Adobe Reader X is a completely new version of the software requiring its own installation.
To install Reader X, please visit http://get.adobe.com/reader/ to download the new installer.
In case you choose to stick with Reader 9, security related updates will likely continue for some time, however feature-related patches will no longer be released.