A few screenshots demonstrating VMware follow. VMware is very nice application, currently in beta, that allows you to run a virtual machine under Linux (or NT if you really must) on top of which you can then run the OS not of your choice (Win 98 in the examples below). (By which I mean I wouldn't normally chose to run WinXX of any variety, but on the occasions that I need it it's preferable to have it in a window under Linux so I can achieve useful stuff whilst waiting for it to boot, recover from its latest crash, or whatever).
I've had very few problems so far- the only applications which have refused to run have been those which require use of DirectX (Age of Empires and Alpha Centauri for example). Word and Excel run without difficulties, and perfomance is acceptable (to be fair, I am running it on a 450 PII with 128 MB, so YMMV, but I am quietly impressed). It at least means that I can do internet banking without having to reboot.
A couple of applications ...
Internet Explorer? Well, I haven't got round to installing Netscape yet, and anyway, I have Netscape on Linux :-)...
A slightly larger window, and that annoying paperclip acting up for the camera...
And back to sanity...
