Hi bsaucer and welcome to the forums.
As far as VB is supported, we are waiting for one or more companies to help us accelerate the development by co-funding the effort. It is actually something that we can do relatively quickly, in less than 40 days of work. Please do not hesitate to contact us at email@example.com
if you are interested.
By the way, I have found this other topic related to VB:http://forums.cshtml5.com/viewtopic.php?f=4&t=257
And here is the link to the feature on the UserVoice page, where people vote for their most wanted features:https://cshtml5.uservoice.com/forums/274799-c-xaml-for-html5-feature-requests/suggestions/9691578-suport-for-vb-net