Been using Asana about a week now so here's some comparisons:
* I like that less is happening on hove compared to Asana—I find the over-reliance on hovers and background changes (cf. new Twitter) very distracting
* the notes idea is cool
* You have the same issue Asana has with "groups"—can't drag a group together
* I prefer Asana's ability to rely on the keyboard heavily
* You should add drag/drop for file uploads, at least using the right pane as the target. I work on a 10yo application so I know why we don't have it but with apps like this it's a no-brainer. It would also improve the upload flow which I dislike, though Google Docs integration is great.