That's a very narrow definition of vector vs raster, the end result looks very different from a photograph. Vector-based drawings have a certain swoopy hand-drawn style to them, vs the realism of altering and recombining photorealistic images.
An example of the opposite style is the giant pencil in the new stopdesign layout:
As pretty as it is, I'm always on the fence about overcooked designs like this for a blog - blogs always have more html to download than a typical static page anyway and I just want to get reading. I based my current site design around minimal reading-friendly sites like:
how are these done? is the vector part that they're svg rather than gif, or are the actually created using scripts in the browser?
[edit: i keep checking out sites in the list using firebug. i'm not a ui person, but i am trying to learn. this looks complicated. is javascript inserting the images?]
For the most part they're images created in a program like Adobe Illustrator, then converted to gif or jpg and placed on the site via CSS. In some of them, the images are used as cels in Flash. The web technology aspect is (for the most part) not especially complicated; the point is to draw attention to the use of illustration as a design element.
One exception to the above is http://www.volll.com, which has some nifty JavaScript animations.
Mirasim is just a background image in CSS. You can see the image alone here:
http://www.mirasim.com/images/page_top.jpg
The Firefox Web Developer plugin is useful for taking sites apart like this ...
