Motorola just did a very nice ‘sponsorship’ of http://explore.twitter.com – the tone of it, the way it’s been done and a genuine feeling of connection between the sponsor and sponsoree. And it feels like something that could legitimately be ‘in beta’ for a while.
It’s basically Twitter Labs, a place where Twitter experiments get posted. Especially cool is Twitter Blocks. Nice.
A nod to David for the tip.