If you're using shared networking, then you can use your Mac's name from Windows:
	Code:
	
C:\Documents and Settings\joevt>ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection 7:
        Connection-specific DNS Suffix  . : localdomain
        IP Address. . . . . . . . . . . . : 10.211.55.6
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 10.211.55.1
C:\Documents and Settings\joevt>ping joemacpro.local
Pinging joemacpro.local [10.211.55.2] with 32 bytes of data:
Reply from 10.211.55.2: bytes=32 time<1ms TTL=64
Reply from 10.211.55.2: bytes=32 time<1ms TTL=64
Reply from 10.211.55.2: bytes=32 time<1ms TTL=64
Reply from 10.211.55.2: bytes=32 time<1ms TTL=64
Ping statistics for 10.211.55.2:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms
C:\Documents and Settings\joevt>
 
In Mac OS X, the Parallels shared networking interface is vnic0:
	Code:
	
JoeMacPro:parallels joevt$ ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
	inet 127.0.0.1 netmask 0xff000000 
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether 00:1f:5b:39:c8:bc 
	inet6 fe80::21f:5bff:fe39:c8bc%en0 prefixlen 64 scopeid 0x4 
	inet 192.168.0.171 netmask 0xffffff00 broadcast 192.168.0.255
	media: autoselect (1000baseT <full-duplex,flow-control>)
	status: active
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether 00:1f:5b:39:c8:bd 
	media: autoselect
	status: inactive
en2: flags=8823<UP,BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 1500
	ether 00:1d:4f:ff:38:5c 
	media: <unknown subtype> (<unknown type>)
	status: inactive
fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078
	lladdr 00:21:e9:ff:fe:bf:99:c2 
	media: autoselect <full-duplex>
	status: inactive
vnic0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether 00:1c:42:00:00:08 
	inet 10.211.55.2 netmask 0xffffff00 broadcast 10.211.55.255
	inet6 fe80::21c:42ff:fe00:8%vnic0 prefixlen 64 scopeid 0x8 
	inet6 fec0:0:0:fea9::2 prefixlen 64 
	media: autoselect
	status: active
vnic1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether 00:1c:42:00:00:09 
	inet 10.37.129.2 netmask 0xffffff00 broadcast 10.37.129.255
	inet6 fe80::21c:42ff:fe00:9%vnic1 prefixlen 64 scopeid 0x9 
	inet6 fec0:0:0:feaa::2 prefixlen 64 
	media: autoselect
	status: active