i thought it might be useful to provide
%Customer.Username%
and
%Customer.Password%
message tokens for the 'Campaign' emails - to give the storeowner the option of sending login credentials with emails - that way, customers don't have to search for them when they return to your store
I added the suggestion to codeplex
http://nopcommerce.codeplex.com/WorkItem/View.aspx?WorkItemId=8157