you can mount almost a hundred (definitely over fifty) different filesystems with linux, compared with two (fat16 and fat32) in windows. oh, three if you include NTFS.
Druaga has some good info above (hello, Druaga!)
It is quite easy to do, once you get the hang of it, but i can't be buggered trying to explain it here, as it involves a lot of variables specific to your system. instead, I'll give you this web page address
, it is the document that explained it all to me when i was confused about this, now i am so clued up about mounting other filesystems that it makes me sad that more modern distributions do it automatically for you! I haven't had to edit /etc/fstab manually since i got mandrake!
ps, once you get mounting filesystems straight in your head, you will want to know about file permissions (lookup references to chmod for this). Careful as permissions are not supported properly in the Fat32 filesystem, and you may have a couple of trials and errors before you can successfully read, write and execute files from your fat32 side. It's all fairly easy though, once you get it....