I posted this a bit earlier in the "Supporting Japan's rebuilding process" thread, but thought that maybe it is worth its own post.
A Yomiuri Shimbun article this morning mentioned that Square Enix is donating 100 million yen (approximately US $1.2 million) to aid in disaster relief.
Here's the press release (Japanese) on the Square Enix corporate site:
http://www.square-enix.com/jpn/news/2011/html/8ff6e79d3ba0894f50d2189db4fa0e67.html
In addition to the donation, the press release also says that they are collecting voluntary donations from employees, and will be setting up ways for people to contribute through their SE accounts and other online services.