First let me say that VirtualBox is pretty awesome. I had been using CoLinux and VB is faster and just better in every way. Debian worked great, and then I tried Ubuntu for the newer packages and it's pretty astonishing how well it all works. Guest additions installed on the first try.
Question: Is there any way to get seamless mode with a WinXP host and a linux guest? Or are there any plans to implement this? I realize I could use an X server in windows and connect to the guest via XDMCP to get a seamless mode wannabe, but if possible I would like to avoid that workaround.