Hybrid theory
Taiwanese component maker and system builder MSI has launched what it claims is "the very first notebook computer in the world that is capable of operating both SSD and HDD hard drives simultaneously".
The Wind U115 Hybrid has both a 120GB/160GB hard disk drive (HDD) and an 8GB/16GB solid state drive (SSD). This enables an ‘ECO' mode, in which the netbook runs exclusively from the SSD, which MSI claims extends the battery life to 12 hours (presumably on the 6-cell battery model).
Here's the spec list:
Processor: Intel Atom Processor Z530 (1.60GHz)
Operating System: Windows XP Home
Chipset: Intel Poulsbo US15W
Memory: DDR2 533MHz, 1 GB
LCD: 10" 1024x600
Storage: 120GB/160GB 2.5" SATA HDD, 8GB/16GB SSD
Card reader: 4in1 (XD/SD/MMC/Memory Stick)
Webcam: 2.0M Webcam
I/O: D-sub x 1, USB 2.0 x 3, Mic-in, Headphone, RJ45
Battery: 3 cells/6 cells
Wireless: 802.11b/g/n, 802.11b/g, Bluetooth V2.0EDR (optional)
Webcam: 1.3M/2.0M
Sound: 2 speakers
Dimensions: 260x180x19-31.5mm
Weight: ~1.0 Kg (3-cell battery)
Click on the image below to go to MSI's product page for the Wind U115.