There's a link at the top of the Map of Anglo-Saxon England link called the Old English Pages which is a virtual archive of Old English complete with electronic texts and sound files. And it also offers a free Old English Text program for downloading, but only for Mac users, that shows thorn and eth in standard Mac fonts. Icelandicize your Mac!, it says. So, AnnaS, I guess the thorn is yours if you want it to show off...and eth, too! Here's the link:

http://www.georgetown.edu/cball/oe/old_english.html

Also, click on the fonts link on the above page for a fascinating look at some Old English scripts.