The above plan sounds great! There are a few things I would suggest, though:
*The landing page should probably serve as introduction to the website's purpose and links to key pages, rather than as an information page in itself. Definitely have stuff about OSes on the wiki, but just link to it from the landing page.
*Registration probably isn't strictly necessary to avoid spam, but there's little harm in having it anyway.
*Definitely links to retailers! Not only is it relevant, but I'm not sure if there's a particularly complete list of them on the Internet currently.
*A buyer's guide would be interesting. It could potentially offer a comparison of (inherent) device characteristics, tips for where to find items, recommended market price etc.
