you can network them, yes....but i'm not sure how easy it is to share printers and everything. they'll be able to see eachother's files though.
In windows you have to Add a Network place and then type in //"name of the computer"/"name of the user"
then you'll need their login name and password to access their files. instead of name of computer, you might try typing in their IP address instead.
On the Mac it should just automatically see the PC.
I now have my Pc and Mac linked together, i have to admit it took a while though.. But when i started doing it, i had very little idea how to network, if you know how to do it well, you should be fine.
networking them is pretty easy, given networking knowledge. Even without networking knowledge, it's probably easier to network a Mac w/a PC than it is a PC with another PC. Well maybe not.