I saw this coming, but not this quickly. Three months has got to be the record for MMO death.

I am so angry. I actually liked the game!

care to explain why?

There was just something fun about it that I can't explain well. I loved giving my SUV some crazy logo, piling people in it, and chasing down criminals as a cop-for-hire. Specifically, I found the driving to be fun, and the drive-by shooting felt better than any other game that had it. There are certain mechanics in that game that should be copied by other developers.
I also feel like in a couple more months, all the issues would've been solved. I remember Star Trek Online being a buggy piece of shit, but I've heard other people talk about how the game is much better now that it's fixed. I was hoping the same would happen for APB, but it looks like they ran out of money to fix it with.

There were at least 6 serious contenders out of 300 interested, but they all didn't want the game + servers+ people working there.
This seems more like a continuation on that so far, there's no reason to believe yet they will get their hands on it over any of the others.

For people wanting a refund, it appears that you have to ask your retailer. So that means anyone who bought it from Steam is stuck. (I don't know what's D2D's policy is, although I expect it to be similar). Retailers of the non-digital variety should be more sympathetic.

I've seen people saying that Wal-Mart is giving store credit if you bought the game recently.

Well, Steam does give refunds on a case-by-case basis, and if you bought APB recently enough that you in no way could have used up a decent part of your free game time, I'm sure they'll give a refund since you didn't get what you payed for. If you bought it at retail and got the life time subscription I assume you're screwed though.
Slightly OT, especially since APB probably wasn't a good enough game for this - but wouldn't it be awesome if a site like GOG did provide clients and servers for some of those dead MMO's, like Tabula Rasa or The Sims Online, kind of like that "Archiving Virtual Worlds" project at some University, but available to the public using a similar business model as GOG.

Christ I forgot APB sold lifetime subs... if that doesn't scare you off MMO's nothing will.

Lifetime subs? :/ Are we some kind of creatures that live only two months?
Though I would love to pay for a WoW lifetime subscription. ^^ I'm sure the game has at least three more years of life.

When does the new section of the game come out?

I'm not sure if a specific release date has been set yet... But the 4.0.1 patch is already available for background download. So my guess is soon... very soon. End of 2010 maybe.
From WoWWiki: "Tom Chilton says that "the expansion still needs a couple more months" but "we are planning to ship the game this year". "

God damn it, nothing to see here

While I know the US has very little in the way of consumer protection laws, I'd be curious to hear some input from someone in the UK on how a shutdown like this works in light of the Sale of Goods Act. Can anyone who bought the game in the UK now demand a refund? Or are there enough loopholes or enforcement difficulties to prevent people from being able to force a refund?

I heard that the UK laws on refunds are very janky and depend on goods sold, that type of stuff. But if you're in the EU refunds are easier to get.