WGET an entire directory

wget -r -l 1 -np http://blah.com/foo

-r downloads recursively, -l X downloads follows links to the X-1 level.

--no-parent prevents (or -np) stops wget from following links to parent directories.

-p downloads images, etc necessary to render HTML files.

See the following link for more info:
http://linuxreviews.org/quicktips/wget/