i've used my printer on my PC via the network w/o a hitch. u just need to have the right drivers on your Mac. i've never bothered to try the scanner tho. networking has worked beautifully. by default your apple will search for and connect to the network available. whatever shared files u have set up on your PC should be available to search thru and use, as soon as your Mac has established a connection. to share your files on your Mac u need to turn on windows sharing which is a point and click process.
so yes,networking your Mac and PC is easy (filesharing included). u can either print from your Mac via the network, or just drop your file over the network onto your PC and then print from there, or do the old fashioned email process that kakaze mentioned.
of note re: the scanner... OS X is much less of a hassle for plugging in peripherals than windows is. once your scanning software and drivers r installed on your Mac, u just plug in via USB and work. none of the "new hardware" messages that XP gives u, nor the reinstallation of drivers which is sometimes done when re-plugging a device that u have already installed.
also,if u r planning on using the notebook at your desk for said scanning in particular ( i can't imagine u'd care to set up your scanner to work, only to scan on image at a time from across the house, before having to go back and switch to the next image.
), i'd say you should consider a KVM switch so you potentially use the same keybord, video, mouse, printer, and scanner on both machines w/o the need for networking.