Brad Plumer has a very good brief roundup of the Senate climate bill that Barbara Boxer and John Kerry introduced today in the Senate. In one sense the details of the bill don't matter too much: it still has to get reconciled with other Senate bills and then go into conference to get reconciled with the Waxman-Markey bill in the House, and pretty much everything is going to be thoroughly sanded down before that process finishes up. Still, it's interesting to at least see the general direction they're pushing toward: basically a little more ambitious than Waxman-Markey but with a few technical adjustments that wonks should like. The full post is here. Kate Sheppard has more here.