On top of the already announced processors, Intel also launched a new mobile processor today, the Core 2 Extreme X7800. This is a 2.6GHz part with an 800MHz FSB and 4MB of L2 cache. This is a mobile CPU and not a modified desktop chip.
This is the first mobile Extreme processor from Intel and the X7900 at 2.8GHz is expected later this year. The X7800 also has an unlocked multiplier which allows it to be overclocked and a Belgian website called Matbe has already got their hands on one in an Asus G2 notebook and they overclocked it to 3GHz.
The downside would be the cost of the new Core 2 Extreme, as the X7800 costs a not unsignificant US$851 in quantities of 1,000. This means that you need pretty deep pockets to get a notebook with one of these in it. Still, if you want the fastest and most overclockable mobile processors on the market, this is the one to go for.