I do also use ies4linux. It's quite good for testing how IE handles CSS layouts, but it doesn't render fonts the same way IE renders fonts on Windows (presumably because the fonts available differ on Ubuntu).
Re:Busting IE8’s Mythbusting
by cookiecaper on Saturday June 20, 2009 @02:01PM
(#666618)
It's illegal to use Internet Explorer without a valid Windows license, even through Wine.
I've heard it's nice, I think it's essential IE files and wine slapped into a pretty package - but I've also heard/seen that you can have several versions of IE for testing stuff out. Might.. be nice. I dunno.