Clean and simple, just how I like it. Nice work on the LinkedIn importer.
Edit: Forgot to add, some more explicit privacy options would be cool. Also the "card" on the homepage (http://resume.io/{username}) seems to not be working correctly(?)
I agree. Most modern OS monospace fonts (Consolas, Monaco, Ubuntu Mono) are more than enough for any kind of programming. I don't really see the benefit of going out and trying new fonts. IMHO font size and color highlighting (color schemes?) play a much bigger role in making my work on a text editor be faster/better.
Of course, it's a matter of personal taste, I did see one guy using Arial as a font on his text editor once...