IE-only websites are an unfortunate reality on the net. They are especially prevalent on the corporate intranet where I work, where the slogan "thou shalt only use IE" is seen in full effect. I use Firefox as my primary browser, and was getting really tired of having to constantly switch to the desktop, find IE, copy & paste an URL from Firefox, and continue browsing in IE.
As I've mentioned before, I've switched to jEdit from XEmacs. I use both WinXP and Linux, and one thing that was nice about using XEmacs was that it was easy to sync my settings between machines. All I had to do was worry about two files: init.el and custom.el. Both were portable, and could be copied directly between machines.
With jEdit, though, there is an entire tree of settings. These settings live under either ~/.jedit/ on POSIX machines, or under "Documents and Settings/USERNAME/.jedit" on a Windows machine. On my Linux machine, for example, there are 104 files under ~/.jedit. It certainly appears that it will be a huge task to sync between machines. There is a "HOWTO" page, but all it really tells you is how hard it is to do. Its more discouraging than helpful, I think.