We have some more reaction to a Obama-Biden ticket from TPM's Josh Marshall:

On the one hand, it's not the most exciting choice. He doesn't bring a state. Delaware's going to go Democratic. And it's barely a state at that. And I'm not sure you'd rate it as a first: "history is made -- first sixty-something white senator with deep foreign policy experience chosen to be vp nominee!" Biden clearly thinks well of himself and likes to talk. But he's been a US Senator for pretty much his entire adult life. (He's 65 today and was elected at 30.) So I'm not sure you can expect anything different. Finally, Biden also occasionally says something really whacked, which we'll probably find out more of if he's the pick.

On the other hand, wholly separate from the cosmetics and electioneering calculus, I think he'd be a good choice. On substance, maybe a really good choice. Most senators grasp of foreign policy is fairly thin -- and it tends to be heavily influenced by whatever lobbyists or power players are in their orbit. But Biden has a pretty deep knowledge of pretty much every big foreign policy question. And his ideas and judgment strike me as fundamentally sane.

And offering the counterpoint is Markos Moulitsas:

Biden voted for the Iraq war. But beyond that, even if we stipulate that he has foreign policy chops, how does that make him a good veep choice? It strikes me that any pick designed to cover up a "flaw" in Obama (i.e. "lack of foreign policy credentials") only accentuates those flaws. Make him secretary of state.

Sure, compared to Bayh and Kaine, Biden looks almost passable, but that's a low hurdle to pass. I'd rather not have to choose my poison. I'd rather have candy.

The rough consensus it seems is that Biden is a safe pick, but there's nothing "change-worthy" about it. Which raises a point: Just how much "change" do the netroots want? Whatever they might think, the country remains a center-right one and throwing up a big lefty next to Obama, to borrow Kos' phrase, only accentuates Obama's liberalism. That's not what the campaign needs to do right now.