Firmware update for Olympus E-330 (v.1.2):
1) AF is possible in Live-Preview B mode (Macro Live Preview). The single AF operates by pressing the AEL/AFL button. The mirror pops down, the S-AF will be activated and the mirror pops up again. During the AF process, the B mode's basic display pattern gets a AF target mark (white line) like an optical view finder for easier focussing.
2) Improved exposure precision when taking pictures in the macro mode and SPOT metering.
Firmware update for Olympus E-300 (v.1.4):
Improved exposure precision when taking pictures in the macro mode using SPOT metering.
All update are available on Olympus support website