Reply All to Calendar event (Exchange) / Running Late...

A feature that I am constantly frustrated with missing is the ability to Reply All to a meeting invite. I do this commonly in Outlook on Windows, where I right-click the meeting on my calendar which brings up a normal email reply that I can edit and send to all meeting recipients. I know many people who also miss this on their iPhone. Common usages are:

1. Quickly firing off an "I'm running 10 minutes late" email

2. Forwarding a document to be reviewed in the meeting

3. Sending meeting minutes

Apple, please add this sorely missing common enterprise required feature. I hoped that iOS 5 might bring it, but it did not.