The Zoomer cables use what I think is an RS-232c plug and the OmniGo
100/120 uses HP's plug so you wouldn't be able to use the cables. The
FlashDisk should work on the OmniGo although it may drain the batteries
faster. Some say not to try as it may cause problems in the OmniGo. I
personally haven't tried so I can't say for sure.
The OmniGo likes to use SRAM cards over FlashRAM, but there are
FlashRAM cards available from MagicRAM (or is it Pretec?) that use
special drivers to make the card more acceptable to the OmniGo.
Nathan