Tesla Motors chairman Elon Musk said at a conference recently that he plans to take the electric car maker public by the end of 2008. Without having had an opportunity to look at the financials -- there hasn't yet been a registration statement or prospectus -- I would say that this is exactly the kind of IPO that investors should avoid.

I know, it's exciting and new. It's technology. It's stuff that could change an entire industry and quite possibly the world. As Musk said, "Thirty years from now the majority of new cars will be pure electric, not hybrid."

Exactly. Just like Sirius Satellite Radio (NASDAQ: SIRI) and XM Satellite Radio (NASDAQ: XMSR). And all those internet stocks. And the hundreds of exciting new car makers a hundred years ago that captured the fancy of investors before they ended in bankruptcy.

This post is part of our Hottest Products of 2007 feature. Also check out our other Hottest Products of 2007 posts and let us know which product you think is the greatest thing since sliced bread.

Do you want one? I want one. But the Tesla Roadster all-electric sports car, rumored to be coming out early next year, is sold out already. I have seen it on television and in several automotive and business journals, and it is an eye-catching, true sports car. And an environmentally friendly sports car, if you believe its billing. They also say it will go from 0 to 60 in under four seconds!

Imagine that: fast, good-looking and energy-efficient (245-mile range on a single charge)! But if you can't get one, what good is it? Well, you can't get one right away, but if you're patient and can swing the $98,000 price tag, rumor has it by the end of 2008, you might get lucky.

The firm was started in the summer of 2003 by engineers Martin Eberhard (former CEO) and Marc Tarpenning in San Carlos; Elon Musk -- former PayPal president, and now chairman of Space X, who can afford just about anything -- is also now chairman of Tesla Motors.