What companies are hosting hospitality events at the ISA 2002 Conference
and Exhibition in Chicago, IL October 21-24, and how do I get
invitations?

The url for the conference agenda is: 

http://www.appcluster02.com/App/main.cfm?moduleid=75&appname=69

but I can't find any social events, if that's what you mean by "hospitality events".

No, I have the schedule.  I'm interested in the events the vendors
host outside the official program.  For example: last year (before the
events of 9/11 basically shut the show down), Rockwell Automation had
scheduled an invitation-only tour of the Johnson Space Center, and
Honeywell (I believe), was hosting an event at an Astros game (at
Enron field).  Thanks for the comment, though.

Usually those lists are accumulated privately, the best sources being
advertising or PR firms servicing companies at the show.  Show
management may also have a list but will guard it jealously, as many
are invitation-only events.

Best source: know someone in any of the three above.

Best regards,

Omnivorous-GA