If you're talking about the latest Facebook hack which occurred just in the last few weeks it was not the sort of malware that could spread to users computers. It was something that infected some laptops of a few Facebook employees and would, apparently, have been used on Facebooks own servers/computers to gather users data not the computers of the general public who visit Facebook.

They say it was discovered before any data was stolen.

So the short answer is no, none of your local network would be at risk.

If it was the sort of infection that does attack home computers then usually only the one infected computer would be compromised unless it was a network worm of some sort but you don't see those very often at all any more.

However, if one of my computers had been infected I would still check all my others very carefully to make sure they were clean since they are all used online to visit mostly the same sites and download similar files.. eg- addons for Firefox etc.

More on that hack..

http://www.telegraph.co.uk/technolog...ed-attack.html

http://crave.cnet.co.uk/software/blo...tory-50010442/