Thanks for taking the lead on this proposal, Waylon!
My primary concern with the proposal is that the "alpha" website combines a number of changes that I think should be made separately. The ideal ODK website will require an infrastructure change (neutral hosting home), a platform change (probably not Wordpress), a change in content, and a change in visual design.
The alpha website combines those things together and I think that will cause real problems for users. I'm particularly worried about deprecation of content and notion that there will be two transitions (one to an alpha site, and then one to whatever the governance committees decides). It's going to be jarring.
A website working group is a fantastic idea. And what I'd strongly prefer is a group whose mandate is to first evaluate what content should be on the ODK website and where the existing content should be migrated to. Getting community consensus on that high-level vision and goal will inform the rest of the changes to infrastructure, platform, and design, and I strongly believe we should do that first before any moves happen.
I am glad to participate in (but not lead) the working group. I am also glad to migrate the current website of UW infrastructure and pay for neutral hosting to allow the community time to decide on an approach.