After some searching, I've seen three tricks: disabling IPV6 on the Mac, doing the same on the PC (my Windows Server 2003 installation didn't have it installed), and adding a line to my /etc/smb.conf file. None seem to really give me full transfer speeds. Are there any tricks specific to Windows Server 2003 or anything new to make this work like normal? It's simple file transfer over SMB, seems like at the 5th iteration of Mac OS X we'd have better speeds. Thanks!