I, as David living mostly in a MS world, and my solution to the problem of accessing files on my network is as follow.

1.
I run ISS (Internet Information Services) Server on one of may computers.
This server I can access from my LAN as well as from WLAN.

2.
Sharing file on a network where the computer running on windows OS, like Windows 98, Windows ME, Windows XP HE and Windows XP Pro, is not always an easy task. The Firewall on the XP is one tricky thing. And the same go for encryption on the WLAN, the smallest nominator for the different OS, I have found, is WEP.

3.
All the web sites I’m running on the server have very restrict access from outside, so I have one special web site where I have given out more access, and this is the one I use for drawing files from the LAN to my 770.

4.
Fore more extensive file-transfer I of cause use the USB-cabel.

Hopeful this will eventual pointing you in the right direction.

TTP