Virtual reality.... within a virtual world?

SO, THIS could confuse you....
PlayStation Home is launching a new alternate reality game called Xi, which will run within the Home world itself.
Mysterious graffiti has appeared in the main square area, and looking at it gives you access to The Hub, where a new Alternate Reality Game opens up.
From what I've heard, you complete tasks within this which open up further missions or tasks - haven't had a chance to try it yet, but it sounds intriguing.
Let's hope this gives a much-needed boost to PlayStation Home.