Interesting:
http://www.macfixit.com/article.php?...60410110722732
UPDATE: MacFixIt reader Russ Cusimano has developed a procedure that allows your to expand the Windows partition without destroying it, or having to re-install Windows XP.
Boot into Mac OS X.
Launch Disk Utility. Make a new disk image of the "NO NAME" volume and save it (preferably) to an external hard drive.
Launch Boot Camp Assistant. Select "Restore the startup disk to a single volume."
Make a new larger Windows partition. Reinstall Windows and the Mac drivers.
Boot Mac OS X.
Launch Disk Utility and restore from the saved disk image to the new "NO NAME" partition.
Boot Windows. Find and delete all the "Desktop" files that Mac OS X left behind.