Please review Utilium.com – a web app for sharing learning materials
kalid: Just took a look as I'm very interested in education. Clean design, but the purpose was unclear.* Screenshots too zoomed out to be useful. Looks like some type of list, but of what?* List concrete examples of what the site does. "Organize and share learning materials" --> I can do that on del.icio.us right now. How is this different?* Sign up page: empty list of schools. Go to wiki/US News and import a list of accredited schools. But stepping back, why must this be presented so early? Have it as a profile field.* Why isn't search on the homepage? [If this is about discovering/sharing new materials]. I need to have an idea of what people are using it for today. I want to search on "calculus" and see what comes up to understand what the site does.* Don't repeat the banner text on the homepage [top bar, 2nd bar]. Have a different pitch.I didn't sign up for an account because I'm not sure what the purpose is. Do you have a tour? Read-only demo account without login? See if you can list out clear benefits. I know 37Signals is bandied about often, but take a look at basecamphq.com. Notice the list of features with mini-screenshots (at a res where you can tell what's happening):Assign tasks 
Share files 
Track time 
Meet deadlinesSomething like that would go a long way to explaining what the site does. Let your homepage be a big sales letter for new users. Returning users will just skip it and click login anyway.