I've been experimenting with #WebCAL subscription on #Android and the difficulties encountered clearly show how much power the owners of the devices in our pockets have.
Such a simple operation like "following" peers is made hard for no technical reason: stock apps do not support that, you have to install something external.
As of today what you need is: install #ICSx5 to subscribe and #ETAR to also see the URL field of the events.
Do you know any simpler way ?