If you have the Steam version of Bit.Trip Beat try opening it up now. You will see an option in the main menu that says "test". Select that and for a limited time, you will see that GLaDOS has infected your Bit.Trip with a horrendously hard bonus level.

I managed to pass it and she says something to you afterwards privately. I couldn't quite make out what she said, but it came from a website that I can't visit again without being authenticated, meaning still logged into Bit.Trip after just having won.

This is a fun little bonus of the Portal 2 ARG. Check it out while it's still happening.

Here's a story about it:
http://www.kotaku.com.au/2011/04/talk-of-portal-2-arriving-early-as-glados-invades-bit-trip-beat/

Shit, I HATE this kind of advertising....

It's not just Bit.Trip but every game in the Potato Sack offer apparently have some Portal 2 thing going on with them now. The Ball apparently lets you run a level in the research facility, another replaces your vehicle with a portal gun, etc.

They even made an entirely new, standalone chapter for Amnesia called "Justine".

There's an Amnesia update for it? Now I'm gonna have to boot it up again when I get home, did wonder why it was updating so much last night...

There's a huge thread over at steam about how this form of advertising will end up really hurting those with small bandwidth allotments and who left steam running all day.

Their fault for leaving a service that can suck up bandwidth running. If you left your faucet running, would it be the water company's fault for charging you a significant amount of money?

I hate to be a jerk but that's a horrible example. When they left their clients running, I'm sure they expected some minor updates if any. If they had most of the potato games installed, that's a 5+ GB non critical download which should not have been added in as an automatic install. Big difference.

And You are not alone on this one.

I don't think it's *quite* as bad as you make it out to be, though I'd have added a caveat - it's like putting a flow inhibitor on your tap and leaving it on to water your plants. If that inhibitor falls off, you're soaked, and you're ticked, but there was inherent risk to what you were doing. The Steam client pretty explicitly says in the EULA that it pushes updates, and as always, ignorance of the law is no excuse. As much as I dislike getting put in a situation where my laziness bites me, it's always my fault, ultimately. Here, too, while Steam will get a number of complaints and some irate customers, in the end, it's not Valve's fault.

edit: I borked the quote

Several people have reportted a 5+ GB total download from this so it is bad to those bandwidth starved customers.

I still don't like your example. That's unexpected failure. This is something that was made mandatory when it shouldn't have been. This does not qualify as keeping their games up to date. There shoud at least be equal blame.