Short answer: No. Not on the consumer side, anyway. Consumer products for the USB 3.0 specification will appear in 2010 which is not all that far away.

How to recognize USB 3.0 when it’s available?

Look for the "SuperSpeed" and "SS" logos, like these:

What new features will be in USB 3.0?

SuperSpeed as shown above. It gives a raw throughput of 500 megabytes, however the realistic transfer rate will be somewhere around 400. But that still kicks the crap out of USB 2.0, transfer speed-wise.

3.0 spec does support power management features for idle/speed/suspend and so on.

Power delivery from 3.0 has increased 50% compared to USB 2.0. Unit load will be 150mA. This means you’ll be seeing more USB gadgets that weren’t available before because there wasn’t enough power coming from 2.0 to run it.

Will USB 3.0 be backwards compatible with 2.0?

Yes – but with one exception. Standard USB 3.0 ports can use 2.0 or 3.0. But what’s labeled as "Standard-B" can only use 3.0-spec Standard-B plugs.

What does it look like?

Standard-B:

Mini-B (has a very noticeable notch):

When will it be here?

As said above, 2010. And we’re talking first quarter 2010 between January and March.

Will there be a card I can buy and install in my PC when it’s available?

PC hardware for USB 3.0 should be available at the same time USB 3.0 consumer devices are introduced to market.

The cards should be cheap. How much they will be I have no idea, but my guess would be below $35. In order for us as consumers to embrace 3.0 spec, the cards we need to use 3.0 must be at a low price point.

Personally, I’m really looking forward to USB 3.0. My only real complaint about 2.0 is the slow transfer speed, and 3.0 will take care of that in short order.

Lastly, for those that ask, "Will my operating system support it?", USB 3.0 should be supported with absolutely no problems at all on Windows, Mac or Linux.