The desktops are all wired, and the laptops are on wireless about 80% of the time.
And here's a bit more info:
Dell PowerEdge 2900 with Windows 2003 SBS
Connected to a Netgear FS116 16-Port unmanaged 10/100 switch (connects the desktops, server, random wall ports, wireless router, and firewall).
Wireless router is a Linksys WRT54GL (was fine when they were smaller, but things have changed. Upgrading to a Cisco Aironet in the coming months, which will certainly help). Also, if you say it's a wireless problem, I would totally believe you
