Sharing between Windows and Macs

How easy is it to share Illustrator do***ents created on Windows with
Mac Illustrator users? Our department is primarily made up of Macs and
we have been using Freehand but see the writing on the wall and have
begun preparing to move to Illustrator. We have just added a Windows
machine to the mix and are wondering how it will work to share
Illustrator do***ents between the two operating systems. We are using
Mac OS 10.4.11 and Windows XP.

Are there any known pitfalls? Things to watch out for? The do***ents
would be maps and comprised of many layers, some scans, lots of line
work and text.

Thanks in advance for your help.

..Jenn.