For years we have maintained that the single most important upgrade you can make to an enthusiast-grade machine is adding an SSD for your operating system and applications. The key downside to SSD technology is its cost per gigabyte, which is significantly higher than traditional mechanical hard drives.
Hoping to nab a slice of the hybrid market, OCZ has launched its RevoDrive Hybrid, which fuses a 100GB SSD to a PCB alongside a 1TB 2.5" hard drive and connects using the PCI Express 2.0 x4 bus. At $500, this solution is priced at a peculiar $0.50/GB. It isn't exactly entry-level but that's significantly less than any SSD.