"Remember yesterday when Team Fortress 2 was on sale for the ridiculous, mathematically-basically-zero price of $2.49? According to the bean counters, we're now broke. Man, what were we thinking? Anyway, in a desperate attempt to move some units, make up the shortfall, and save the company, TEAM FORTRESS 2 IS ON SALE FOR $2.50 UNTIL 7PM PDT! Pennies from Heaven!"
http://store.steampowered.com/app/440/

"Gee," you may be thinking, "I already bought a copy."
Well, sure, but did you buy extra copies to give away as holiday gifts? Because - thanks to Steam's gifting system - you totally can.
Here's the best part: You can buy a bunch of copies now for $2.50, then when your grandparents unwrap them on Christmas morning, TF2 will be selling for $19.99 again. They'll think you spent almost 700% more than you actually did! It's like you're stealing from us and lying to your grandparents! It's the perfect crime!
And because we're so crazy, for all we know, by the time December rolls around, we might be selling Team Fortress 2 for six hundred bucks. Or more! Who knows? OH MY GOD GO BUY SOME PRESENTS!

Hmm, neat. If I didn't already have the Orange Box, I'd buy that.
...if I had any interest in multiplayer games whatsoever. ;)

Yep, they're running it again, gogo!

Since I'm feeling generous, the first person to friend me on Steam will get a free copy of TF2.
lbartley

This deal is now over, but I have a guest pass if anyone wants it. Just add me on Steam (username: Arkose).

Didn't even think about buying a few copies just to gift them and convince more people to play this pure genius of an experience. But I found out about it too late just a few minutes ago.

I'd like to try it if the opportunity hasn't passed...
Added.
I don't mind if I don't get it, it's just great to know some like-minded people!

If you missed the deal keep an eye out -- they might offer it again some time tomorrow.

The news posts about the last 2 deals were:
October 29, 2009, 12:12 pm
October 30, 2009, 5:11 pm
I suppose that they might do it again sometime this morning. Hopefully I won't miss it again if they do a third sale.

My guess is that they plan on offering it in two hours blocks every day of the 'Halloween' promotion/content and it continues to November 2nd.

It's weekend now, I don't know if someone from Valve goes to work to set the deal. Perhaps they'll do it from their home if anything.
It would be nice to have the deal every day during the halloween time

Man, I'm going to end up missing out on the achievies because I have a life outside of gaming, hahaha.
last night I got sloshed at the moto with my family.

What is a moto?
Yeah, I am going to miss out on it too :(, and it looks like it will be very fun. Hopefully I can get some TF2 time in before people start coming to the party.

Sushi bar.