I published a brief article last month about a set of test we were doing on a production data warehouse that was performing very poorly. Running the database on a Dell Server with 4 x 73GB SAS drives configured in RAID0 we got a respectable 575 IOs per second (IOPS) on a random write test. Running the same tests and same database with a Fusion-io 160GB ioDrive we got a staggering 22,327 IOPS. This is 38.8 times faster and significantly better than I expected.
Random reads were 21 times faster, sequential writes 25.3 times faster and sequential reads 2.4 times faster.