A couple of tools that might help a small office setting up for telecommuting are logmein and hamachi...
Logmein is a remote desktop app... similar to GoToMyPC but they have a free version... I use that extensively.
Hamachi is a zero-configuration VPN that works through most firewalls... very handy for communicating from home to work, or between home users or whatever... the free version has a limit of 16 computers... the pay version can link 255 computers together in one subnet... Very easy to use... I use it to link all my work computers together with my home computers so I can transfer files, use remote desktop or VNC... all kinds of goodness. :-)
Both tools are available at
www.logmein.com