The Socket standard Ethernet CompactFlash card is a plug-in card that works in CompactFlash Type I or II slots and with all Pocket PCs, Windows CE-based Pocket PCs, and Handheld PC Pros. 

  It lets you synchronize files, contacts, appointments, tasks, e-mail, or mobile channel content from anywhere you network. You can also back up and install software at Ethernet speed. It's ideal for mobile.... More here

  The Pretec CompactLAN card is one of the smallest Ethernet LAN adapters designed for Windows-powered Pocket PCs to gain high-speed access to a corporate network. 

  It is compatible with the Pocket PC, Windows CE Palm-sized PC, Handheld PC, or AutoPC. CompactLAN offers a 10 Mbps maximum data transfer rate, over 500 times faster than a serial port connection.... More here

  The Socket rugged Ethernet CompactFlash card is a plug-in card that works in CompactFlash Type I or II slots and with all Pocket PCs or Windows CE-based Palm-size PCs and Handheld PC Pros. 

  It lets you synchronize files, contacts, appointments, tasks, e-mail, or mobile channel content from anywhere you network. You can also back up and install software at Ethernet speed. It's ideal for mobile... More here