I am currently watching the iPhone SDK press conference. They have announced that the iPhone will soon support proper communication with the Exchange. This includes complete Calendar support. What I wish they have done is to license the same technology for the iCal. That would have been an ideal solution for all of us who suffers being a Mac user within a corporate environment.
I do understand that it may be possible to sync the appointments between iCal and Exchange either by using current solutions or through syncing with an iPhone, but what I am looking for is free/busy integration as well.
So, we all have two hopes now, the first one is that the Groupcal will be updated, and the second one (Oh, that would be fantastic) that Apple will begin to support enterprise standards for calendars.
Stay tuned for more updates.