What the font?! identifies fonts from images
It's pretty simple to use, just upload the image, fill in any missing letters and let the site do the work for you. I submitted several things - some that I knew the font name and some that I didn't - and always got a selection of possibilities.
There is also a forum so that if the online tool can't identify a font, other users can try their hand at it.
So, if you've had your eye on someone else's font and have been wondering what it is, now is your chance to find out.

Sushi Cat is one of the cutest Flash games I've ever run across. You play a blue cat with a major talent for eating and, fortunately for you, every level is filled with delicious sushi! The controls are simple: you aim and drop from the top of the screen using the mouse, trying to hit as much sushi as you can on the way down. Eat enough sushi, and you can go on to the next level.
Your score depends on how much sushi you eat, and which bucket the cat lands in when it finally reaches the bottom of the screen. The more ...