If you install WordPress and use the media uploader to manage your images in your posts - you can easily style your images quickly by adding the following code to your theme's stylesheet.
CSS:
img.alignright, img.aligncenter, img.alignleft {padding:4px;background:#efefef;border-color: #aaa #ccc #ddd #bbb;border-style: solid;border-width: 1px;}
img.alignright {float:right;margin-left:5px;}
img.alignleft, img.alignnone {float:left;margin-right:5px;}
img.aligncenter {display: block;margin-left: auto;margin-right: auto;}
img.alignright {float:right;margin-left:5px;}
img.alignleft, img.alignnone {float:left;margin-right:5px;}
img.aligncenter {display: block;margin-left: auto;margin-right: auto;}
This code will set up your images to float appropriately, as well as give a nice border as seen below.
Note* This information is now updated: Updated CSS





[...] week or so ago, I posted some information on how to quickly style your WordPress images. After recently updating my company’s web site (SDAC Inc. - I noticed if you used captions, my [...]