WikiWord is a proposed Wikimedia project that would serve as a database for word etymologies in any language.
Kinds of articles:
- Single words, with in-depth information (i.e., no abbreviations) and literary examples
- List of words with common roots
- Overviews of root languages
http://www.wikiword.org/ is unregistered, and it could serve as a portal for various languages.
http://xx.wikiword.org/ could be for XX language etymologies.