Hi Rob,
No-one is working on that so it would be great if you would like to do it.
I would suggest you get mojoportal from svn trunk and build your feature as an external module. Look at the Poll feature for a good example of implementing an external module. Note especially if you right click the PollFeature.UI project in VS and choose properties you will see how post build event is used to copy files to the needed locations beneath the main web project.
Let us know if you have any questions as you get into it.
Thanks,
Joe