Yes, there are several options depending on your file systems and installed software.
- booted in Mac, with FAT32 file system in Windows:
read from and write to the windows partition from your Mac desktop (Windows HD icon)
-booted in Mac, with NTFS file system in Windows:
read from the windows partition from your Mac desktop,
and write only if you have such tools as Paragon NTFS (search for this)
-booted in Windows
read and write only with such tools as MacDrive (search)
-booted in Mac, with Windows running as a virtual machine in Fusion (or Parallels?)
entire access to both drives, also copy and paste to clipboard across OS platforms
I'm partial to the Fusion solution (search the forum), but in some instances (minimum RAM, running high-memory software; running native from BootCamp is better). You can have both, retaining your bootcamp partition for running windows natively, AND running Windows as a virtual machine, with Fusion (or Parallels?) from your existing bootcamp partition. It's pretty sweet, IMO.