Intel is preparing the small form factor Penryn for 2H08 so this one off (using Merom and early spin of the packaging) for Apple is special and likely shouldn't be used to make predictions from.It's interesting that they have released the MacBook Air with a smaller Merom processor. Ideally this should have a Penryn chip in it - for heat and processing power.
"standard" size Penryns are ready now for the mobile space with more coming in May.