I guess I know how to pick 'em. On my second try for the Fortune 500 Corporate Blog Project, I picked Deere (#96). I like to look at the tractors, and their residential business is nearby. But they don't have a blog.
Deere sells machinery for homeowners, contractors, and—most famously—farmers. They could probably get a solid readership just by blogging tractor pictures and stats. They have a solid web site, including newsletters and magazines for their market segments, a gift shop, and even a site for kids.
But no blog, no feeds. Well, actually, lots of results for "feed" when you search their site, but they're talking about the kind you give to your livestock to eat.
Moo.