Some sites can justify breaking if javascript is off, but not yours.
edit: Additionally it seems HTML is not escaped at all. I should have used something more obvious than just <b>ing the comments...
The favicon is uploaded.
Hmm..as of using it, maybe if you can make it like a widget where i can link it to my site, that will be more usable (at least for me) in terms of setting up polling system.
1 annoyance: the results page took ~10seconds to render. Mostly because you are using many copies of a fixed size image to render the bars. Why not resize a single image or just make it a html element?
Get rid of "win iPhone" insert. It takes away more from the site than it actually adds to it. Also the "Tags" column solves the problem that I'm not sure exists. But it sure does clutter the page. I'd get rid of it too until you are certain that the user experience is (dramatically) improved by having it there.
Functionality seems perfect to me but I would need more time with it.
As far as the concept I'm not sure - polls don't seem that exciting to me but maybe you know something I don't.
Nice design.
Remove the categories pane completely. Replace checkboxes with buttons - clicking on them will cast the vote. Use the common categories from Digg / Stackoverflow and others (Top surveys, Controversial, Upcoming)