Here are some useful links:
First for just everyday things from/about japan:
http://www.reddit.com/r/Japan
some things i found on that recently are:
http://vimeo.com/44619388
For questions about the language:
http://www.reddit.com/r/LearnJapanese/ (ask your own or just read others)
A good online dictionary is:
http://tangorin.com/

Hope these help
-Chris