in your environment.rb, you can define new date/time formats e.g.
[Time::DATE_FORMATS, Date::DATE_FORMATS].each do |obj|
obj[:dots] = "%m.%d.%y"
end
so then in your views you can use:
Created: <%= @my_object.created_at.to_s(:dots) %>
which will print like:
Created: 06.21.09