IMS web page states emailed invites will go out tomorrow.
It also has an updated FAQ, and
info about the campsite and how things will be different this year.
That's being widely discussed elsewhere, but the gist of it is:
Motorhomes/caravans will be put in the same area.
Tents will be put in a separate area.
If you want to camp with someone, turn up at the same time as them.
Hrm...