I looked on eBay to see if I could find one to show you a picture, and we're in luck. They come in suede, leather, vinyl and something else I know - I see them all the time for $129-$159 as promos in local stores:
http://cgi.ebay.com/Vinyl-Black-Rocker- ... dZViewItem
The one I am getting (fingers crossed she still has one in stock) is hunter green and leather. I have moved my office to the living room and have a hunter green oversized recliner and floral couch - so it's a good match for me. I've sat in these chairs time and again and LOVE them, but they never had the right color in stock while I was there, and I was never in that big of a hurry... so I've waited to find the one I wanted.
Anyway, they swivel and rock and recline - and the ottoman moves too, so if you were rocking it would rock with you. They are COMFY and small enough to use in front of a desk - or nice enough to use in another room.
Right now I use a basic rolling office chair with an unmatching footstool - so this one is perfect for me!