.wang - general.  Wǎng is a Chinese Mandarin pinyin rendering of 网 (traditional 網) meaning
             "web" or "portal".  Wang is also a common surname in mainland China.

.watch - Watchmakers, jewelry stores, watch repair shops, neighborhood watch groups

.watches - watches

.webcam - web cam shows and video sharing

.website - general

.wed - engaged couples and wedding-oriented businesses

.wedding - wedding-oriented businesses

.whoswho - Who's Who (general)

.wiki - wikis

.win - games, Microsoft Windows

.wine - Wineries, wine bars, wine shops, wine distributors, wine clubs & online retailers,
            wine review sites

.work - general

.works - Contractors, distribution companies, appliance wholesalers & service, auto/boat/heavy
              equipment businesses, companies with solution based products or services

.world - Brands with an international presence, nonprofits and charities, travel agencies & adventure
             companies, world travelers & global communities, any business with “world” in its name

.wtf - Bargain websites, photo & video aggregators, meme sites, news of the weird