AppTalk

Actually, of course, it's Google Goggles, which is Google's cute way of saying search by image rather than text. It's now available on the iPhone as part of Google Mobile Apps. (Droid users would have me add the word "finally"--they've had it for about 10 months.)

Once you've downloaded--or updated--your Google Mobile Apps, the next question is how to use Goggles.

You might think it will be listed among the Apps--like GOOG-411--but it's not. Instead, you use Goggles by clicking on the Search button in the lower left corner. There, you'll now see a camera button near the search term field. That's your Goggles.

Before you use it, you'll be able to watch a short video introducing Goggles to you--or, if you can't wait, you can watch it right now.