Featured maps are usually special in some way or deserve extra attention.
Each time someone visits the site, a map is randomly selected from this list and displayed on the front page. To give each map a reasonable chance of being seen, this list shouldn't get too long. Around 8 maps is more than enough. Please remove the "featured" tag on maps that have been here for a while and pick new maps.
To feature a map, simply tag it with featured. You're welcome to feature your own map(s) if you want.