I want to clarify the rules about posting links on the wiki travel site. I noticed there isn't a article about Okinawa in the Japan section and I wanted to try to work on it. We rented a car when we were there and that is the easiest way to get around on the island. I was thinking about posting a link to the English site we used to rent the car. Is that ok?
Also, is it ok to post a link to my blog? For example, if I'm writing about the Dragon boat festival in Naha, can I link to the blog I wrote about it?
In principle if the links are relevant then there's no reason not to post them. It's also going to depend somewhat on how long someone has been a member how their adding of links is evaluated by the next person. In your case you will certainly get the benefit of the doubt, whereas if someone signed up today, went into the wiki and added a random link and then left again, that'd most likely be looked at a lot closer.
With the link to the blog, the hardest part I'd say would be to keep it written in an objective manner. But if it adds something to someone researching the Dragon Boat festival, then it should be okay.
There's some useful articles linked from the 'About this guide' page on Writing about Businesses and Keeping it Neutral (among many others).
I would agree with Sam. Remember keeping it neutral, or if you don't like place maybe try to think of people that will like it and gear the posting to them. I have gotten a few messages about hotels and sites i have written about. I always try to make links to museum, site or business pages if they are in english as the title of the article, until a longer article is written about that place.