There are several different ways to make that symbol. I'm going to tell you three.
1. Press and hold down the ALT key and on the keypad (the number pad on the right hand side of your keyboard...not the numbers above the letters) punch in 0169
This is the best way to do it if you want it somewhere you cannot edit the HTML (like in the title of this post)
2. When writing a post you can click on Edit HTML and add & copy ; with no spaces where you want the © symbol
3. When writing a post (or editing the HTML of anything for that matter...this goes for #2 too) click on Edit HTML and add & # 169 ; with no spaces where you want the © symbol
That's it :) Pretty cool huh?