Good guess.

As an Icelander, I must surely ask what pushed you to use Icelandic as an example. :)

That it would look foreign to the maximum number of people.

Success!!

People love thorn. Anglos used to have it and now that it's gone, they miss it.

I don't þink ðere's any reason we can't have ðem back -- þorn and eð, I mean.

Does Icelandic have the 'th' sound? I've heard that English is the only European language with it, but if Icelandic has the written thorn, maybe you have that sound too?

It does, that's precisely what þ and ð represent (the unvoiced and voiced variants respectively, which got folded into the same "th" in English). Also, þorn is the best letter name ever :)

Spanish seems to have 'th' as well