There’s been some debate going on about the power savings available from the new Intel SSDs. I was in a session specifically on SSDs titled "Extending Battery Life of Mobile PCs Using Intel® High Performance SATA Solid-State Drives". The class was quite impressive, showing an average 15% power savings using Intel SSDs versus using a 7200rpm SATA hard drive while at the same time performing better and faster than the hard drive. Overall, the savings on similarly configured systems was over 30 minutes.
You can view the full PowerPoint slide set through the IDF website.