So far, both of the announced Intel Core 2 Duo Penryn CPUs have shown up across the entire M1330 line in the US. Both CPUs have an 800MHz Front Side Bus (FSB) and both have 6MB of L2 Cache.
Intel Core 2 Duo T9300 : 2.5GHz $400 more
Intel Core 2 Duo T9500 : 2.6GHz $675 more
It is currently available only on the XPS M1330s in the US on the Dell XPS page
but will probably start showing up in the other XPS and Inspiron lines in the next week or two.