Egomedia.com

Well if you are looking at trying to create their graphics then go ahead jsut make sure it is on your own account.
I myself see things and try to duplicate them with the knowledge that i have to challenge myself. But i never use them.

Deker gave you 3 very good tips....

Also if you want to try to get a nice and VERY detailed effect like that you can use Filter>other>High Pass....mess with that a little and you'll see you can get the "hard" lines of an image to stand out.
Then in the levels pallet up the contrast to give the had lines even more seperation from the rest of the image....
Like i did with this pic of me and my Dalmation (cody).

http://home.hiwaay.net/~cbutts/oddstuff/me-n-cody.gif

What I do to achieve that look is just make the image grayscale and then go to Image > Adjust > Levels... and bring the left and right ones toward the middle. Just play with them until you get what you want.