I know that this seems to be rather obsolete, but someone might have some use of it.
IPAQ Compatible Hardware for iPAQ IA-1 and IA-2
LSI based dongles:
# Netgear EA 101 10T
# 3Com Ehternet Adapter 10Base T
# Asante Friendly Net USB Ethernet 10T
# Linksys USB10TX v2
# Peracom Ethernet 10BaseT
HPNA 2.0
# Netgear PHONELINE 10X 10MB USB HOME NETWORK ADAPTER
# Linksys USB200HA
# INTEL APR2H2USB HPNA 2.0
# D-Link DNH-120
# 3Com HomeConnect
ADMtek based dongles:
# Linksys USB10TX v3
# Linksys USB100TX 100T
# D-Link DSB-650TX 10/100 USB Ethernet
Mice
# Standard Microsoft USB mouse or compatible
Cable/DSL routers
# Standard DHCP based Cable/DSL routers should work
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Regards,
Artur