You can also use VNC the have both a client and server of OSX which is a free download. I use it export my Mac's display to the Windows XP laptop work gave me.
I suggest using VNC4X it's a rather nice GUI wrapper for OSXvnc [ http://www.redstonesoftware.com/osxvnc/ ](which supports tight compression [or should]). It also has some nice boot up features that are otherwise a hassle to setup.