Below are a few official websites I have managed to find – do you know of any others, please get in touch and I will add.
Government of Comoros – Is frequently updated, mainly with government news, but also has a few links which leisure travellers might find useful.
Comoros Customs – This website is mainly for businesses, but appears to be frequently maintained and updated. For a leisure traveller, nothing much of interest.
National Tourism Office website appears to at least be maintained by somebody, however it is hopelessly outdated.
Incredibly, this site is advertising free online porn as well as somewhat dubious medicinal products (viagra, cialis etc). It must be the only government website in the world which thinks this is a great idea!!!
Your best bet to find any valid travel information is to look for travellers blogs. You can find some here – if you find any others, let me know and I will be happy to add them.
Al-Atwan Comoros daily news – get an idea about whats going on in Comoros.
The Gazette – Another new site similar to the above.