AnandTech investigated whether Intel's Turbo Memory technology is worth your money.
The one unique feature that Santa Rosa offered that no other competing mobile platform, Intel or not, could bring to the table was a technology called Turbo Memory. An on-motherboard flash card, Intel's Turbo Memory is designed to act as another layer in the memory hierarchy, caching data where possible and improving performance/battery life in notebooks. A version of Turbo Memory will also be released for the desktop, but we're most interested in what it can do for notebooks.
Check it out over here. Overall their findings are that Turbo Memory isn't really worth the premium price. They say that in some cases it can improve battery life by up to 5-10% but overall it's probably better to wait for the second revision of this technology which will hopefully be a bit better.