Became a user of http://lyricstranslate.com yesterday, and I really like this community! It reminds me some open source communities, http://en.wikipedia.org/, http://stackoverflow.com/, http://creativecommons.org - a new way of sharing information, new kind of lifestyle.
Functionality is really great (I love Ajax in lookups, placeholders, free editing of any content etc)
Still, there is no limit for perfection!
- history of edit changes
- licensing (GNU & different CCs)
- statistic by languages (it's really great, see wiki stats for articles per language)
I'll be back here to add more!