I have blogged about this project before, but it is good enough to blog about again. The project, called ies4linux exists to support installing and running multiple original versions of IE (5.0, 5.5, 6.0, 7.0) under Linux using Wine and CAB files. Another good blog entry on Web Expose talks in detail about IE 7.0 support and has a good thread of comments from early testers and adopters.
IE on Linux. Never would have guessed that one back in 1999, would ya? =)