By the way, you can change the size of the text in any particular post.
Look just below the text box on the far right and you see "Text size: 11 px" with a +/- to make it bigger(this is 15). At least you can make it easier on everone else :).
Don't know if there's any way to change the default though.
Also - it doesn't seem to show any bigger on the forum. Looks great editing though!