For those folks out there that are looking for another way to flip between browsers, I introduce you to Optool. I found this tool via Chris, and I do have to say for coming in such a small package (112 KB to be exact) it packs a lot of punch. You can switch between Firefox, Internet Explorer, and Opera by default.
You can plug your own browser into the mix, if it isn’t one of the big three. It is yet another good way to do a little quick browser switching.