Last count eGroups (http://www.egroups.com/) boasts at least 13 Steinberg/Cubase message groups. Among the list are:

cubase	1555 Members, open to thePublic
vst-mac	801 For Members
CubaseUSA	299 Members, open to thePublic
cubase-jp	99 For Members
CubaseUS	66 Members, open to thePublic
cubasis	49 Members, open to thePublic

To find the Steinberg/Cubase area that interests you most, simply insert the word "Steinberg" in the Search group box on the first page and hit enter. You will be presented with the entire list.

Always free, eGroups is an invaluable resource for information on countless topics.