Hi everybody.
Custom driver for Linksys WCF54G 802.11b/g CF-card (Pocket PC 2003/Windows Mobile 5)
is located at http://winm-soft.atspace.com.
It supports promiscuous mode, monitor mode and continuous preamble mode (!!!).
It works with standard system wireless interface and various sniffers.

HP iPAQ and Dell X51 tested.