I have a 770W linked to a desktop PC and a laptop PC by ethernet and a wireless laptop (802.11b). The wireless laptop connection to the Internet works whether or not the desktop is on. I initially had problems viewing the network machines and so made the wireless connection a DISTINCT network from the desktop/laptop (it works happily enough). It helped to turn off all machine F/Ws (the 770w has a hardware F/W) and then re-enable the F/W for the wireless connection ONLY once setup was complete. I restricted access to named MAC addresses only. I set WPA-PSK as the security, set automatic connection (not manual) and hid the SSID. I have tried to puzzle out the restriction for outgoing traffic on the 770W but it still defeats me (I'm not up to speed technically yet), so I use Zone Alarm.
I'd like to boast that I did this all in minutes but it actually took about four hours to solve every problem as it cropped up <LOL>. I recently reset all the passwords for security's sake and had a frustrating hour trying to get it all to work again.
The manual is informative but is written by TECHNICIANS who understand everything but communicate little. I'm an average Joe with networking experience that stopped at Novel 3.12. Sites such as homenethelp (
http://www.homenethelp.com/802.11b/index.asp) shed light on broad aspects but not on the nitty gritty. Once I have sorted out the restrictions on outgoing traffic, I'll pat myself on the back.