As others have already mentioned, PEP8 validation is enable by default, which is a little excessive in my opinion (specially with the line < 80 chars rule). It would be great to be able to disable individual rules, a la Ecliplse/Netbeans.
All in all it looks very nice, thanks for sharing.
I have a fairly large screen (27inch cinema display) and use Vim. 80 Character lines are perfect. They look nicer, are easy to read (in the same way books are easy to read when lines are not super long) and with vim can accommodate ~4 split windows side by side which is useful.
No, we shouldn't. It's about just the right line length to mate reading a lot easier. Take a look at this to see what I mean [1]. Another thing, one liners are great, and I love them too. But they don't hurt only readability.
All in all it looks very nice, thanks for sharing.