Wine

http://www.winehq.com/

http://blog.drinsama.de/erich/en/linux/2006040302-msie-on-linux
http://business.newsforge.com/article.pl?sid=06/04/27/155209&from=rss

http://frankscorner.org/

Exemples

http://www.hermann-uwe.de/blog/playing-starcraft-on-linux-using-wine