Best Univeral Format? For Win 7, XP, and MAC?

[leopardforest]

I have two external HD's that I formatted under a Mac (I am not too sure what the formatting is called, something Journaled), but I want to reformat them o work on all my machines. I have an iBook and Windows 7, and I use XP at work. So what is the best universal format?

 

[tlarkin]

Network them and you don't need to fuss with file systems. FAT32 is compatible with everything but it is not as secure and has limitations.

There is a new 64bit FAT in the works but I don't think anyone supports it yet.

 

[leopardforest]

Network them and you don't need to fuss with file systems. FAT32 is compatible with everything but it is not as secure and has limitations.

There is a new 64bit FAT in the works but I don't think anyone supports it yet.

I tried networking them. Maybe I didnt do it correctly, but I am able to see my mac desktop, but I cant see the external HD's. Any idea what I am doing wrong?