Not all EEE PC's connect to WMWifiRouter without some effort. While for many users it works out of the box, for some it does not.

Several users have reported that if you cannot get WMWifiRouter to work with the EEE PC, there are two different scripts (a list of commands you execute in the console) that may help: 

For some, the complete first script listed below is required:

/etc/dbus-1/event.d/25NetworkManager stop
ifconfig ath0 down
wlanconfig ath0 destroy
wlanconfig ath0 create wlandev wifi0 wlanmode ad-hoc
iwconfig ath1 channel 1
iwconfig ath1 essid WMWifiRouter
ifconfig ath1 up
dhclient ath1

For other, the following shorter version does the trick as well:

wlanconfig ath0 destroy
wlanconfig ath0 create wlandev wifi0 wlanmode adhoc
iwconfig ath0 essid WMWifiRouter