Email ICS meeting requests automatically for new/updated milestones.

I don't know how difficult it would be to add, but it might nice to have an ICS format meeting request sent out via email automatically to anyone assigned to a new or updated milestone. I've seen this on some other collaboration sites and it works really well. A person then just opens the ICS attachment and clicks "Accept" in their favorite email program to add a reminder to their local calendar.

An example of this process can be demonstrated on www.tungle.com. Tungle is NOT an online collaboration service, however.