The latest release of the HD DVD Interactivity Jumpstart kit is available from the same download location, linked to from http://www.microsoft.com/windows/windowsmedia/forpros/hddvd/default.aspx.
Please note that this release relies on some components installed by Media Player 11 and Internet Explorer 7, which are both still in beta. As with all pre-release software, you should not install this on mission-critical machines.
An on-line programming guide is also available at http://msdn.microsoft.com/library/default.asp url=/library/en-us/HDDVDATK/htm/hddvdprogrammingguide.asp.

HD DVD Jumpstart v0.2 now available!
killerless
The "Ctrl+R" issue is still around though -- (Press it several times as you work to reload the current playlist, and each subsequent time iHD execution is a little bit slower... to the point that after about 5 restarts, it's completely bogged down.)
Edit - added a close-paren.
Tryst
You can't guarantee that because the Toshiba likes it that it's not against the spec. There are a number of things where the spec says you "may" do something, and a player that did do it would break if you assumed that it didn't.
Which errors are you referring to
JVJ
Yes, networking should work now. Note that you won't be able to do networking on a real disc on a real player unless you have AACS enabled.
I have a rather complex sample that I should break up into smaller pieces and blog.
snowsquirrel
Shughes
I went through almost all of your blog hoping you had put up the sample networking code but I couldn't find it.
Any idea where I could find a code sample
Really appreciate your blog. It has been very informative.
Thanks!
Unnati
shwasasin