I haven't been, but I've been lusting for a trip to Iceland, riding the ring road on my scooter (probably won't happen since there doesn't seem to be any reasonable way to get it there from the States) or more likely, on a rented motorcycle.
Take a look at this thread from Varaflame, who kindly helped me out with some travel info:
A trip into east iceland (lots of photos)
I'm hoping to do it next year, but with one more daughter completing one more year of college to graduate (her graduation date is what my wife and I are now calling our "Tuition Independence Day"
) I might have to move that up by a year or so.
I love the land...I would much rather visit interesting geography than cities. Iceland has it all: Glaciers, geysers, volcanoes, etc. in one place.
Have a great trip...post pics!