back to computer techniques 101... i think its a thorn, (its used in german, if i am not mistaken.. but no matter someone will know..)

as for how you make one..

what type computer do you have?
Window 95 or 98, go to Start-->Run--> (and type in )charmap it will open a window with your font set. (a menu window at top will allow you to chose an font.) the complete font will be displayed, in some cases, there will even be as scroll bar.

select any character (click on it) on the lower right hand corner of the window, there will be a key code.
hold the Alt key (usually) and use the numeric keypad on the right side of the key board (not the numbers above the letters) type in the key code.
voila
Alt + 0182 (and yes, the zero is needed)in Arial gives you
Alt + 0198in Arial gives you Æ as in Ætna, or Æsop, Þ is Alt + 0222 in many fonts...

if you have a Windows 2000 machine, the char(acter)Map can be found on Start-->Programs-->accessories-->

if you have a Mac, ask AnnaStrophic or Jazzo...

these directions should be copywrited!©