Host Stephen Colbert grilled Lutz on global warming, man-talk, and 40-mile extension cords, and Lutz mostly held his own. Except, that is, on the global warming question. This is the man who declared global warming to be a “crock of sh*t” in February, but he’s also the man charged with convincing people that GM is looking forward and the Volt is a good idea. Colbert left Lutz hanging a bit when he asked why GM didn’t just call the car the Chevy Gore.

Lutz made his appearance the day after GM’s 100th birthday celebration and the official unveiling of the probable production design of the Volt, and a week after the images of the Volt design leaked to the web. Lutz himself is a speed and power man, and the “adequate” performance of the Volt seems to pain him a bit. He was a good sport about the whole thing, but what would you expect from, as Colbert calls him, a master of the universe?

GM Next Day, as the company is calling it, will also have a global broadcast at 8 a.m. Eastern (I will not be getting up at five out here on the West Coast to listen in, so you’ll have to fill me in using the comments), followed by a series of live chats with executives, including Vice Chairman of Global Product Development, and leader of his own automotive cult of personality, Bob Lutz.

Oh, and don’t forget — today is the official unveiling of the production Volt design, though you’ve probably already seen the slew of photos leaked to the web last week.

Unofficial official image of Lutz and the Volt from Autobloggreen.com.

GM chair Bob Lutz told Automotive News Europe that the production Volt will be the “next generation global compact architecture.” For those who don’t speak Auto Industry as a first language, that means the U.S. version of the Volt will use many of the same underpinnings as GM’s upcoming world-market offerings. For examples of this design, keep an eye out for the Opel Astra and Chevy Cruze at the Paris auto show this year.

Meanwhile, according to Motor Trend, GM and the EPA are debating whether the Volt is a hybrid or an electric vehicle. The outcome will decide how fuel-economy numbers will be calculated. The car has an electric motor with a combustion engine that acts as a range extender when the batteries run out.

GM wants the car to pass the EPA’s tests using the electric motor 85% of the time, which would give it a rating of 100 mpg or more. The EPA wants the Volt to pass the tests with its batteries near full charge at the end, which would require the gasoline-powered engine to run most of the time. This calculation would drop the fuel economy to about 48 mpg. When fuel economy is your sales tool, a Prius-like 48 mpg might hurt sales of the $40,000-plus Volt.

While the Roadster was based on a Lotus platform, the S will be completely developed in-house. It will also be a bit cheaper than the $100k Roadster, since its body will be formed from aluminum rather than carbon fiber. According to Autocar, a U.K. site, there will be three models of the S available: a 160-mile range for $60,000; a 220-mile range for $68,000; and a future 300-mile range version that hasn’t had a price pinned on it yet.

Tesla will use the same lithium-ion battery technology that powers the Roadster in the S series, and it expects to eventually sell 20,000 S cars a year. If the California company can pull off building a four-door EV sedan for $60,000, the plug-in hybrid Chevy Volt — which still requires gasoline and will likely retail for more than $40,000 — may have a serious challenger on its alternative-fuel hands.

The image is obviously from Autocar.co.uk.

This right here is the front driver’s side corner of the production Volt. Are you excited yet? Have you added your name to the unofficial list of 30,000-plus who are interested in buying the car for less than Chevy wants to sell it?

GM has flooded the Internet with so many images and baby steps during the development process that it feels like we’re entering “Snakes on a Plane” territory. By the time the Volt actually appears in driveable, saleable form, we’ll all be over it.

But in case you’re not over it yet, here’s the tail end of the car:

Fan site GM-Volt.com has a waiting list for the Chevy Volt with more than 33,000 names on it. (Actually, as of the moment I’m writing this post, there are 34,179.) This number is the kind of encouragement GM engineers need to get the Volt to the market on time in late 2010.

The problem with the list is that its about as unofficial as unofficial can be. The Web site is not in any way affiliated with GM, and there are no deposits being taken by the company yet. The “Wait List” on GM-Volt.com asks for name, address, enthusiasm level, and the price you’d be willing to pay for the plug-in hybrid.

California led the pack of Wait Listers by far, with Texas, Florida, Michigan, and New York rounding out the top five most interested states. On a scale of 1 to 10, enthusiasm was just over 9, but people aren’t so excited about parting with the cash. The average Wait Listers were willing to pay for the PHEV was just over $31,000, about $9,000 short of what GM expects MSRP to be. Nearly 8,000 responders were willing to put their money where their keyboard is, though, with the average deposit they were willing to plunk down for the Volt being $2,500.