Daniel Vine came up with a remote browser-testing service so that those of us without Windows PC’s can test to make sure our websites look ok.
I checked this webpage out and while it’s not necessarily the prettiest thing (I forgot how horrible font handling was in Internet Explorer), it at least works.
Update: I just found out that this is the same guy who made the ever-so-cool iCapture, a similar program that shows how webpages look under Mac browsers.