It's a nice app but please, please hire a real icon designer, it looks like a joke.
Granted most of the users that would find this app useful are power users, the teaser text on the site is probably more technical than it should be. Sentences like "There's no need to get out of your current context to check out a random link - just queue it to visit after you finish your current article" come to mind when I say that.
If you're interested I'd be more than happy to send you a couple other copyedit/text edits to that landing page. Just email me.
Edit: How is this a joke? You mean, the cartoonish style?
Thanks!