With regard to
http://dmoz.org/Regional/Asia/Singapore/Travel_and_Tourism/Travel_Guides/,
Expatsingapore.com is available to me.
Chinatown of Singapore, the 2nd entry, is about more than Chinatown. Title misleading, imo.
The Real Destination Singapore is an entry page to 4 destinations, Singapore, Bangkok, Jakarta and HK. Site should be listed higher up somewhere, maybe in
http://dmoz.org/Regional/Asia/Travel_and_Tourism/Travel_Guides/.
Agree there should be only one domain per category, as in the previously mentioned visitsingapore.com
Also wrt
http://dmoz.org/Regional/Asia/Travel_and_Tourism/Travel_Guides/,
APM Forum hasn't been updated for 6 years now, if that makes any difference to the directory.
Backpack Asia appears to be gone.
Custom Tour Guide | Photos of Asia and South Asia - I think I would call this something else, maybe D W Bennett Custom Tour Guide?
Imperial Tours - take out "luxury"? I know that's what the site says, but lux. is in the eye of the beholder, no?
The Internet Travel Guide - Title should be something like Pongü's Hotel and Travel Guides. Apparently title and perhaps emphasis have changed over the years.
Leon Kaye's Travel Home Page is about travel not just in SE Asia but also Eastern Europe, so maybe move to more general locale that Asia.
Luxury Travel: The Silk Road - Another "luxury" site?
SuiteAsia.com: Travel Forum and Community - While it's true the forum is still there, it's very hard to see from all the hotel rez stuff from travel.ian.com (read travelnow.com).
TravelForum.org - Not just Indonesia and Thailand forums, but specifically Bali and Lombok rather than Indonesia as a whole.