Ha. It has been well over 2 years and I never received anything. I tried when I first gotten the service several times to get info to receive the protection but to no avail. I finally gave up and bought some.
The welcome kit is sort of a overview of the service and how to use it. Probably the biggest part is the F-secure anti-virus activation key. Most of the welcome kit info can be found here http://help.exede.net/articles/General/5118