i can confirm that the new mbp's with the 120gb hd are using perpendicular technology.
the hd model no. in mine is MHW2120BH. link to fujitsu website --> http://www.fujitsu.com/global/suppor...h-catalog.html
From that Fujitsu link (under *note):
The MHW2160BH (160GB) is applied Perpendicular Magnetic Recording (PMR) technology.
The MHW2080BH has PMR technology model and Longitudinal Magnetic Recording (LMR) technology model.
The other capacity products are applied LMR technology.
So it looks like the 120 is LMR according to the last line...